Wildland Shrub and Arid Land Restoration Symposium

Total Page:16

File Type:pdf, Size:1020Kb

Wildland Shrub and Arid Land Restoration Symposium United States Department of Agriculture Proceedings: Forest Service Intermountain Wildland Shrub and Research Station General Technical Report INT-GTR-315 Arid Land Restoration April 1995 Symposium SHRUB RESEARCH CONSORTIUM USDA Forest Service, Intermountain Research Station, Shrub Sciences Laboratory*, Provo, Utah, E. Durant McArthur (Chairman); Brigham Young University*, Provo, Utah, Daniel J. Fairbanks; USDA Agricultural Research Service, Renewable Resource Center*, Reno, Nevada, James A. Young; Utah State University*, Logan, Frederick D. Provenza; State of Utah, Department of Natural Resources, Division of Wildlife Resources*, Salt Lake City, David K. Mann; University of California, Los Angeles, Philip W. Rundel; Colorado State University, Fort Collins, William K. Lauenroth; University of Idaho, Moscow, Steven J. Brunsfeld; University of Montana, Missoula, Don Bedunah; Montana State University, Bozeman, Carl L. Wambolt; University of Nevada-Reno, Paul T. Tueller; University of Nevada, Las Vegas, Stanley D. Smith; Oregon State University, Corvallis, Lee E. Eddleman; New Mexico State University, Las Cruces, Kelly W. Allred; Texas A & M System, Texas Agricultural Experiment Station, San Angelo, Darrell N. Ueckert; Texas Tech University, Lubbock, Ronald E. Sosebee; USDA Agricultural Research Service, High Plains Grassland Research Station, Cheyenne, D. Terrance Booth; USDA Agricultural Research Service, Jornada Experimental Range, Las Cruces, New Mexico, Jerry R. Barrow; USDA Forest Service, Intermountain Research Station, Renewable Resource Center, Reno, Nevada, Robin J. Tausch; University of Utah, Salt Lake City, James R. Ehleringer; Weber State University, Ogden, Utah, Cyrus M. McKell; Washington State University, Pullman, Benjamin A. Zanora; University of Wyoming, Laramie, Rollin H. Abernethy; Battelle Pacific Northwest Laboratories, Richland, Washington, Steven O. Link; E G & G Energy Measurements, Inc., Las Vegas, Nevada, W. Kent Ostler; *Charter members Proceedings: Wildland Shrub and Arid Land Restoration Symposium Las Vegas, NV, October 19-21, 1993 Compilers: Bruce A. Roundy, Professor, Department of Botany and Range Science, Brigham Young University, Provo, UT. Formerly at School of Renewable Natural Resources, University of Arizona, Tucson. E. Durant McArthur, Project Leader and Research Geneticist, Shrubland Biology and Restoration Research Work Unit, Shrub Sciences Laboratory, Intermountain Research Station, U.S. Department of Agriculture, Forest Service, Provo, UT. Jennifer S. Haley, Resource Management Specialist, U.S. Department of the Interior, National Park Service, Lake Mead National Recreation Area, Boulder City, NV. David K. Mann, Program Manager, UWIN Program, Habitat Section, Division of Wildlife Resources, Utah Department of Natural Resources, Salt Lake City, UT. Publisher: Intermountain Research Station Forest Service U.S. Department of Agriculture 324 25th Street Ogden, UT 84401 Contents Page Bruce E. Roundy Introduction: wildland shrub and arid land restoration .......................................................... 1 E. Durant McArthur Overview.................................................................................................................................................................................... 5 Edith B. Allen Restoration ecology: limits and possibilities in arid and semiarid lands ...................................................................................................................... 7 Stephen B. Monsen Implications of early Intermountain range and watershed E. Durant McArthur restoration practices ........................................................................................................... 16 Steven G. Whisenant Landscape dynamics and arid land restoration .................................................................. 26 Restoration and Revegetation ....................................................................................................................................... 35 Laurie B. Abbott Seed fate of warm-season perennial grasses .................................................................... 37 Bruce A. Roundy Sharon H. Biedenbender Jerry R. Barrow Natural methods of establishing native plants on arid rangelands ..................................... 44 Kris M. Havstad Jayne Belnap Reestablishing cold-desert grasslands: a seeding experiment in Saxon Sharpe Canyonlands National Park, Utah ...................................................................................... 46 S. H. Biedenbender Replacing Lehmann lovegrass with native grasses ........................................................... 52 B. A. Roundy L. Abbott Kevin W. Blomquist Effects of soil quality and depth on seed germination and Glen E. Lyon seedling survival at the Nevada Test Site .......................................................................... 57 Mark Briggs Evaluating degraded riparian ecosystems to determine the potential effectiveness of revegetation ............................................................................... 63 Margaret A. Brooks Evaluating roadside revegetation in central Arizona .......................................................... 68 Janelle L. Downs Restoration of big sagebrush habitat in southeastern Washington .................................... 74 William H. Rickard Larry L. Cadwell Raymond Franson Health of plants salvaged for revegetation at a Mojave Desert gold mine: year two ............................................................................................................ 78 Michael P. Gonella Characterization of rare plant habitat for restoration in the Maile C. Neel San Bernardino National Forest ......................................................................................... 81 H. D. Hiatt Reseeding four sensitive plant species in California and Nevada ...................................... 94 T. E. Olson J. C. Fisher, Jr. Mark Holden New arid land revegetation techniques at Joshua Tree Carol Miller National Monument ............................................................................................................ 99 T. N. Lakhanpal Regeneration of cold desert pine of N.W. Himalayas (India)— Sunil Kumar a preliminary study ........................................................................................................... 102 Page Bruce A. Roundy Lessons from the past—Gilbert L. Jordan’s revegetation research in the Chihuahuan and Sonoran Deserts ......................................................................... 107 Robert D. Slayback Restoring Mojave Desert farmland with native shrubs ..................................................... 113 Walter A. Bunter L. Robert Dean Wayne Tyson Ecosystem restoration: theory, practice, and evidence .................................................... 116 M.Carolyn Watson Water requirements for establishing native Atriplex species Bruce A. Roundy during summer in southern Arizona.................................................................................. 119 Steven E. Smith Hossein Heydari Bruce Munda Bruce L. Welch Beyond twelve percent purity ........................................................................................... 126 Von K. Winkel Effects of gravel mulch on emergence of galleta Juan C. Medrano grass seedlings ................................................................................................................ 130 Charles Stanley Matthew D. Walo Von K. Winkel Effects of seedbed preparation, irrigation, and water W. Kent Ostler harvesting on seedling emergence at the Nevada Test Site ............................................ 135 Warren D. Gabbert Glen E. Lyon Irene S. Yamashita Results of four revegetation treatments on barren Sara J. Manning farmland in Owens Valley, California................................................................................ 142 Ecology .................................................................................................................................................................................. 149 Bertin W. Anderson Growth factors for woody perennials at western Sonoran Joseph A. Atkins Desert wash revegetation ................................................................................................. 151 Roger D. Harris J. P. Angerer Spatial and temporal variability of microbes in selected soils V. K. Winkel at the Nevada Test Site .................................................................................................... 157 W. K. Ostler P. F. Hall Julie Beckstead Effects of afterripening on cheatgrass (Bromus tectorum) and Susan E. Meyer squirreltail (Elymus elymoides) germination ..................................................................... 165 Phil S. Allen R. R. Blank The soil beneath shrubs before and after wildfire: J. A. Young implications for revegetation ............................................................................................. 173 F. L. Allen W. R. J. Dean Dryland degradation: symptoms, stages, and hypothetical cures .................................... 178 Suzanne J. Milton Morné du Plessis W. Roy Siegfried W. D. Gabbert Plant succession on disturbed sites in four plant associations B. W. Schultz in the northern Mojave Desert .......................................................................................... 183 J. P. Angerer W. K. Ostler J. Arthur Hayes A bitterbrush dieback in the upper Gunnison River Basin, Colorado ..............................
Recommended publications
  • Askdoctorbonsai-Book Sm.Pdf
    COLD WEATHER VARIETIES Contents Can not be grown indoors - Outside spring through late fall (25 degrees) - Cold location in winter (below 50 degrees) 2 What is Bonsai? 7 Basic Bonsai Care 11 Indoor Trees Non-deciduous Deciduous: 11 Light ! Andromeda ! Beech 12 Humidity ! Atlas Cedar ! Birch ! Blue Moss Cypress ! Crabapples 12 Ventilation ! Cryptomeria ! Elms 13 Temperate trees ! Eastern Hemlock, ! Hornbeams 16 Cold Weather trees ! Hinoki Cypress ! Larch 20 Fertilizing ! Pines, all varieties ! Linden 21 Soils ! ! Rhododendrons Japanese Maples 23 Repotting ! Spruce, all varieties ! Native Maples 28 Pruning, Shaping & Styling ! Yews ! Pears 29 Maintenance pruning ! Privet ! Prunus species 30 Pruning to style ! English Holly ! Hawthorn ! Procumbens Juniper ! Wisteria 31 Wiring ! San Jose Juniper ! Ginkgo 32 Insect Control ! Rocky Mountain Juniper 34 Moss 35 Vacation care 35 Your Bonsai Through the Year 38 Categories of Bonsai 40 What is a Bonsai? TEMPERATE Q Outdoors in summer and fall - Can stay out late into fall (25 degrees) - Cool location for winter The exact origins of Bonsai are difficult to determine, but it is A generally believed that the art form began in China, and from there spread to Japan. Trees from the wild were collected from cliff faces and rocky ledges, ! ! trees that had naturally been growing in limited amounts of soil. A tree Adelyensis Cypress Western Hemlock grows differently under such adverse conditions: it grows more slowly, it ! Azalea ! Ilex Pagoda develops definite bark character, smaller foliage, windswept branches, a rugged aged appearance. A small Bonsai pot imitates those adverse natural ! Bald Cypress ! Japanese Yew conditions. ! Boxwoods ! Procumbens Juniper In simplest terms, a Bonsai is a tree, shrub, tropical plant, grass, or herb, grown in a small container and shaped to recreate the look of an older tree ! Catlin Elm ! Pyracantha in nature.
    [Show full text]
  • An Evaluation of Environmental Impact Assessment Within the Planning Process in Libya and the UK in Relation to Cement Manufacture
    An evaluation of environmental impact assessment within the planning process in Libya and the UK in relation to cement manufacture. ELBAH, Salah. Available from Sheffield Hallam University Research Archive (SHURA) at: http://shura.shu.ac.uk/19608/ This document is the author deposited version. You are advised to consult the publisher's version if you wish to cite from it. Published version ELBAH, Salah. (2002). An evaluation of environmental impact assessment within the planning process in Libya and the UK in relation to cement manufacture. Masters, Sheffield Hallam University (United Kingdom).. Copyright and re-use policy See http://shura.shu.ac.uk/information.html Sheffield Hallam University Research Archive http://shura.shu.ac.uk uuMnmwu utIN I Ht CITY CAMPUS, POND STREET, SHEFFIELD, S1 1WB. 101 715 620 4 REFERENCE Fines are charged at 50p per hour 0 8 JUL 2003 r Unto if - - 3 C o ™ f o u i L - H (/7 .( q R - AJo /btcn u “ ! AUG ?H03 TfeM . ici|7_|c,C| - 2 MAR 2004 ^ , j q 2 6 JAfj 2005 A DSS ^ z |c § 5 bopier U.W. Jib iofiojoj /Ybp/< zr £//7 / v o'/p /o . /o ProQuest Number: 10694489 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest ProQuest 10694489 Published by ProQuest LLC(2017).
    [Show full text]
  • An Introduction and User's Guide to Wetland Restoration, Creation
    An Introduction and User’s Guide to Wetland Restoration, Creation, and Enhancement A Guide for the Public Containing: • Background on wetlands and restoration • Information on project planning, implementation, and monitoring • Lists of resources, contacts, and funding sources Developed by the Interagency Workgroup on Wetland Restoration: National Oceanic and Atmospheric Administration, Environmental Protection Agency, Army Corps of Engineers, Fish and Wildlife Service, and Natural Resources Conservation Service 2003 ACKNOWLEDGMENTS This guide would not have been possible without the contributions of many individuals. The members of the Interagency Workgroup on Wetland Restoration were critical to the document’s development from start to finish: Susan-Marie Stedman, National Oceanic and Atmospheric Administration (NOAA) Fisheries; John McShane, Lynne Trulio, Doreen Vetter, Mary Kentula, and , U.S. Environmental Protection Agency (EPA); Jack Arnold, U.S. Fish and Wildlife Service (FWS); Jeanne Christie, Natural Resources Conservation Service (NRCS) and now with the Association of State Wetland Managers; and Colleen Charles, US Army Corps of Engineers (Corps) and now with the US Geological Survey. The Workgroup would like to acknowledge the members of the Expert/User Review Panel for their practical knowledge and valuable input: Alan P. Ammann, NRCS; Robert P. Brooks, Pennsylvania State University’s Cooperative Wetlands Center; Andre F. Clewell, Society for Ecological Restoration (SER); Donald Falk, SER; Susan Galatowitsch, University of Minnesota; Curtis Hopkins, Ducks Unlimited; Mike Houck, Audubon Society; Michael Josselyn, Tiburon Center for Environmental Studies; Jon Kusler, Association of State Wetland Managers; Julie Middleton and Leah Miller-Graff, Izaak Walton League; Steve Moran, Nebraska Rainwater Basin Coordinator; Richard P. Novitski, RP Novitzki and Associates; Duncan T.
    [Show full text]
  • Training and Pruning of Apple and Modern Trends of Development - an Overview
    Turkish Journal of Agricultural and Natural Sciences Special Issue: 1, 2014 TÜRK TURKISH TARIM ve DOĞA BİLİMLERİ JOURNAL of AGRICULTURAL DERGİSİ and NATURAL SCIENCES www.turkjans.com Training and Pruning of Apple and Modern Trends of Development - An Overview Stefan GANDEV , Vasiliy DZHUVINOV Fruit Growig Institute, Plovdiv, Bulgaria *Corresponding author: [email protected] Abstract Since Second stage of intensification of apple industry in Europe started during early of 1970`s with Dutch `Slender spindle` training system for high density plantations. Other systems such as `Verical axis', V and Y- shaped system,`Tatura trellis`,`Solen`, `Solax`, `Cone` etc. were developed in different countries of the world. Planting systems were classified at five group as low to ultra high density, that is since less 1000 to more than 8000 trees per hectare. According to studies in France during the last 40 years, apple tree cultivars have been classified in four group depend of their fruiting type - I type Starkrimson, II- Reine des Reinettes, III-Golden Delicious and IV-Granny Smith. This classification give us the answer why we have biennial bearing for the apple cultivars in type I and regular bearing for type IV, and why is very important to maintain good balance between vegetative growth and reproductive shoots as a part of apple canopy architecture. Keywords: Malus domestica (Borkh), training and pruning systems, fruiting type and habit Introduction - an annual production and better quality fruit The evolution of apple industry in different which requires a balance between fruiting and countries from 1950 to 1970, apple training (goblets, vegetation vigour. structured hedgerow) and pruning have resulted in good High yield performance of fruit crops results fruit production in terms of yield and fruit quality.
    [Show full text]
  • Growth Patterns in Woody Plants with Examples from the Genus Viburnum by MICHAEL DONOGHUE
    Growth Patterns in Woody Plants with Examples from the Genus Viburnum by MICHAEL DONOGHUE Scientific journals are full of information obtained at the current limits of human perception. Using instruments like the electron mi- croscope, biologists examine the structure of very small objects while astronomers, using extraordinarily complicated technology, can tell us details about the structure of the universe. All of this may give the impression that scientists have already observed and understood everything that can be seen with the naked eye. In botany, at least, nothing could be further from the truth. As Peter Raven (1976) has made painfully clear, we know virtually nothing about most plants, especially those that grow in the tropics. There are still many things we can learn just by looking at plants closely (Tomlinson, 1964). One thing that botanists know surprisingly little about is why and how it is that woody plants (trees and shrubs) come in so many differ- ent shapes and sizes. We are all aware that elms, firs and oaks (Fig. 1), to choose only a few examples, have characteristic forms that differ radically from one another, but we seldom stop to consider what accounts for this. There are several kinds of explanations for these differences in form. One kind of explanation concerns the evolu- tionary causes of the differences. For example someone might "ex- plain" that woody plants occupy a wide variety of habitats, that in 2 Figure 1. These three photographs by E. H. Wilson serve as a remxnder that trees come xn a wide variety of shapes and sxzes.
    [Show full text]
  • Parametric Identification of a Functional-Structural Tree Growth Model and Application to Beech Trees (Fagus Sylvatica)
    Parametric Identification of a Functional-Structural Tree Growth Model and Application to Beech Trees (Fagus sylvatica) Véronique LetortA,*, Paul-Henry CournèdeA, Amélie MathieuA, Philippe de ReffyeB, Thiéry ConstantC AEcole Centrale of Paris, Laboratoire de Mathématiques Appliquées aux Systèmes, F- 92295 Châtenay-Malabry cedex, France BCirad-Amis, UMR AMAP, TA 40/01 Ave Agropolis, F-34398 Montpellier cedex 5, France and INRIA-Saclay, Parc Orsay Université, F-91893 Orsay cedex, France CLERFOB UMR INRA-ENGREF No. 1092, Wood Quality Research Team, INRA Research Centre of Nancy, F-54280 Champenoux, France. *Corresponding author. Email: [email protected] Abstract. Functional-structural models provide detailed representations of tree growth and their application to forestry seems full of prospects. However, due to the complexity of tree architecture, parametric identification of such models remains a critical issue. We present the GreenLab approach for modeling tree growth. It simulates tree plasticity in response to changes of their internal level of trophic competition, especially regarding topological development and cambial growth. The model includes a simplified representation of tree architecture, based on a species-specific description of branching patterns. We study whether those simplifications allow enough flexibility to reproduce with the same set of parameters the growth of two observed understorey Beech trees (Fagus sylvatica, L.) of different ages and in different environmental conditions. The parametric identification of the model is global, i.e. all parameters are estimated simultaneously, potentially providing a better description of interactions between sub- processes. As a result, the source-sink dynamics throughout tree development is retrieved. Simulated and measured trees were compared for their trunk profiles (fresh masses and dimensions of every growth units, ring diameters at different heights) and for the compartment masses of their order 2 branches.
    [Show full text]
  • Effects of Bush Encroachment Control in a Communal Managed Area in the Taung Region, North West Province, South Africa
    Effects of bush encroachment control in a communal managed area in the Taung region, North West Province, South Africa RO Mokgosi orcid.org 0000-0001-8975-0868 Dissertation submitted in fulfilment of the requirements for the degree Magister Scientiae in Botany at the North West University Supervisor: Prof K Kellner Co-supervisor: Prof P Malan Graduation May 2018 21003149 i DECLARATION I, Reamogetswe Olebogeng Mokgosi (21003149), hereby declare that the dissertation titled: Effects of bush encroachment control in a communal managed area in the Taung region, North West Province, South Africa, is my own work and that it has not previously been submitted for a degree qualification to another university. Signature: ……………………………… Date: …………………………. Reamogetswe O. Mokgosi This thesis has been submitted with my approval as a university supervisor and I certify that the requirements for the applicable M.Sc degree rules and regulations have been fulfilled. Signed: ………………………………… Prof. K. Kellner (Supervisor) Date: ……………………....................... Signed: ………………………………. Prof. P.W. Malan (Co-Supervisor) Date: ………………………………….. ii Abstract The communally managed Taung rangelands are degraded because of bush encroachment. Bush encroachment is defined as a natural continuous retrogressive ecological succession, resulting in the increase of both alien and indigenous encroacher woody species and a reduction in grass species composition. This in turn result to changes in soil chemical and physical properties. The knowledge of the interaction between bush encroachment, land-use and soil conditions is essential to sustainably manage these areas. More than 80 % of the respondents in the Taung area owns cattle. To mitigate poverty stress; many pastoralists in the Taung area resorted to high stocking rates, leading to high grazing pressures locally and thereby, led to bush encroachment.
    [Show full text]
  • Landscape Dynamics and Arid Land Restoration Steven G
    Landscape Dynamics and Arid Land Restoration Steven G. Whisenant Abstract—Restoration strategies that initiate autogenic Most rangeland improvement recommendations begin succession—by using rather than by combating natural processes— with the premise that activities (investments) should focus have great potential for arid ecosystems. Damaged ecological pro- on sites with the greatest potential for a positive economic cesses must be restored to restoration sites. Landscape dynamics return. That is sound advice from a financial investment can be directed toward restoration objectives with strategies that: viewpoint. However, the failure to consider landscape inter- (1) reduce or eliminate the causes of degradation; (2) address soil actions may create unanticipated problems. For example, degradation and initiate soil improving processes; (3) establish in arid regions, depositional areas at the base of hills are vegetation that addresses microsite availability, soil improvement, commonly selected for restoration efforts because of their and nutrient cycling problems; and (4) arrange landscape compo- inherently better soil, nutrient and water relations. The nents to reduce detrimental landscape interactions while increasing best restoration effort on those sites may fail due to prob- synergies among landscape components. Landscape configuration lems on other parts of the landscape. Accelerated sheet can be designed to: (1) encourage synergies among landscape com- erosion on hill slopes can lead to channel deposition that ponents; (2) reduce nutrient losses to adjacent landscape compo- steepens the slope gradient. This initiates channel en- nents; (3) facilitate natural seed dispersal mechanisms; (4) attract trenchment that creates steep channel banks susceptible beneficial animals; and (5) reduce detrimental animal activities. to mass failure or slumping.
    [Show full text]
  • Creation and Rendering of Realistic Trees Jason Weber1 Joseph Penn2 Teletronics International, Inc
    Creation and Rendering of Realistic Trees Jason Weber1 Joseph Penn2 Teletronics International, Inc. Army Research Laboratory "From such small beginnings - a mere grain of dust, The model must be capable of creating a wide variety of actual tree types as it were - do mighty trees take their rise." and related vegetation such as shrubs, bushes, and palms, as well as cacti Henry David Thoreau from "Faith in a Seed" and even large grasses. Shrubs, for example, can be easily simulated with the model since they really only differ from trees in that they are usually ABSTRACT shorter and have multiple trunks originating directly from the ground [REIL91]. The model must be able to handle random parameters so that a Recent advances in computer graphics have produced images approaching very large number of structural variations can be generated from the design the elusive goal of photorealism. Since many natural objects are so specifications of a particular tree species. It should also implement time- complex and detailed, they are often not rendered with convincing fidelity dependent oscillations due to wind and other perturbations. due to the difficulties in succinctly defining and efficiently rendering their Use of the model must be understandable by a common user with only geometry. With the increased demand of future simulation and virtual a general knowledge of basic geometry, such as directly observable angles reality applications, the production of realistic natural-looking background and lengths. This excludes the use of any model parameters requiring objects will become increasingly more important. understanding of difficult principles such as differential equations.
    [Show full text]
  • Wetland Restoration: Contemporary Issues & Lessons Learned
    The Association of State Wetland Managers August 2017 Wetland Restoration – Contemporary Issues & Lessons Learned Cover photo by Jeanne Christie, Association of State Wetland Managers 2 Wetland Restoration – Contemporary Issues & Lessons Learned Wetland Restoration Contemporary Issues & Lessons Learned Authors (listed by SDC approach): • Marla Stelk, Association of State Wetland Managers • Jeanne Christie, Association of State Wetland Managers • Richard Weber, P.E., USDA Natural Resources Conservation Service Wetland Team • Roy R. “Robin" Lewis III, Lewis Environmental Services, Inc., & Coastal Resources Group, Inc. • Joy Zedler, Ph.D., University of Wisconsin-Madison • Mick Micacchion, Midwest Biodiversity Institute • Tom Harcarik, Ohio EPA’s Division of Environmental and Financial Assistance • Lisa Cowan, PLA, StudioVerde • Norman Famous, Consultant • John Teal, Ph.D., Woods Hole Oceanographic Institution • Peg Bostwick, Association of State Wetland Managers • Peter Skidmore, Walton Family Foundation • Bruce Pruitt, USACE Engineer Research and Development Center • Larry Urban, Montana Department of Transportation • Julie Merritt, WGM Group Suggested Citation: Stelk, M.J., Christie, J. , Weber, R., Lewis, R.R.III, Zedler, J., Micacchion, M., … Merritt, J. (2017). Wetland Restoration: Contemporary Issues and Lessons Learned. Association of State Wetland Managers, Windham, Maine. 3 Wetland Restoration – Contemporary Issues & Lessons Learned ASWM WETLAND RESTORATION WORKGROUP In response to reports quantifying the shortcomings of wetland restoration over past decades, the Association of State Wetland Managers (ASWM) created a Wetland Restoration Work Group in 2014, composed of twenty five experts, including practitioners, regulators, policy makers, scientists and academics. The Work Group was tasked with identifying the most significant barriers to wetland restoration and identifying actions to address these challenges based on lessons learned and the substantial collective expertise of the Work Group and others.
    [Show full text]
  • The Art of Bonsai (PDF)
    PUBLICATION 426-601 The Art Of Bonsi Diane Relf, Extension Specialist, Horticulture, Virginia Tech Bonsai is an art form that stems from ancient Asian culture, Branches that occur lower down on the trunk should be the originating in China and developed by the Japanese. In longest, and biggest in diameter, with branches growing the 13th century, the Japanese collected and potted wild higher on the trunk becoming successively shorter and trees that had been dwarfed by nature. These naturally smaller in diameter. This imitates the natural appearance formed miniatures were some of the first bonsai. of a tree, suggesting that the lowest branches are the oldest (biggest/longest), and higher branches, having grown A bonsai (pronounced “bones-eye”) is literally a “tree in a more recently, are smaller and shorter. pot,” which further imitates, in miniature, the appearance of an old tree in nature. Old specimens in nature, unlike Bonsai can be classified into about 10 basic styles, of juvenile trees, have compact rounded tops, and horizontal which the most common are; formal upright, informal or drooping branches, which make them appear aged and upright, slanting, cascade, and semicascade. These graceful. There are three sizes of bonsai, ranging from classifications are based on the overall shape of the tree under 5 inches to about 30 inches in height. and how much the trunk slants away from an imaginary vertical axis. Not all plants are equally effective as bonsai. To produce a realistic illusion of a mature tree, all parts of the ideal • The formal upright style is one type that is considered bonsai - trunk, branches, twigs, leaves, flowers, fruits, to be easy for the novice bonsai grower.
    [Show full text]
  • Pages 90-116
    90 THE GLOBAL FRAMEWORK 3 The Organic World Having just discussed the global patterns of climate, active growth if the temperature is below 6°C and and how they have changed through time and may for most of the species of temperate deciduous for- change in the future, we now move on to a consid- est there must be at least six months with tempera- eration of some of the global patterns of organic tures above such a minimum. phenomena: plants, animals and soils. These are On the other hand, any simple relationship be- components of what is often called the biosphere. tween the climate and vegetation type may be ob- scured by differences in such factors as soil type, the activity of fires and the actions of man. The 3.1 Major Vegetation Types problem of mapping the major zones is com- Just as it is possible to classify and map major cli- pounded by the fact that their delimitation will in- matic types, so it is possible to classify and map the evitably be arbitrary, for there are very few clear-cut main types of vegetation on the face of the earth lines in nature. There is also the perennial problem (window 3.1). At a very gross scale, the distribu- of whether the zones should be small in number, tion of vegetation types is closely related to the dis- simple in type – and thus probably overgeneralised tribution of climatic types, and one of the classic – or whether one should go for more categories, ideas of biogeography was that if an area of land – but then inevitably cause a lack of clarity.
    [Show full text]