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Functional Ecology's Non-Selectionist Understanding of Function
Studies in History and Philosophy of Biol & Biomed Sci xxx (xxxx) xxx–xxx Contents lists available at ScienceDirect Studies in History and Philosophy of Biol & Biomed Sci journal homepage: www.elsevier.com/locate/shpsc Functional ecology's non-selectionist understanding of function ∗ Antoine C. Dussaulta,b, a Collège Lionel-Groulx, 100, Rue Duquet, Sainte-Thérèse, Québec, J7E 3G6, Canada b Centre Interuniversitaire de Recherche sur la Science et la Technologie (CIRST), Université du Québec à Montréal, C.P. 8888, Succ. Centre-ville, Montréal, Québec, H3C 3P8, Canada ARTICLE INFO ABSTRACT Keywords: This paper reinforces the current consensus against the applicability of the selected effect theory of function in Functional biodiversity ecology. It does so by presenting an argument which, in contrast with the usual argument invoked in support of Function this consensus, is not based on claims about whether ecosystems are customary units of natural selection. Biodiversity Instead, the argument developed here is based on observations about the use of the function concept in func- Ecosystem function tional ecology, and more specifically, research into the relationship between biodiversity and ecosystem func- Biological individuality tioning. It is argued that a selected effect account of ecological functions is made implausible by the fact that it Superorganism would conflict with important aspects of the understanding of function and ecosystem functional organization which underpins functional ecology's research program. Specifically, it would conflict with (1) Functional ecology's adoption of a context-based understanding of function and its aim to study the functional equivalence between phylogenetically-divergent organisms; (2) Functional ecology's attribution to ecosystems of a lower degree of part-whole integration than the one found in paradigm individual organisms; and (3) Functional ecology's adoption of a physiological or metabolic perspective on ecosystems rather than an evolutionary one. -
Alternative Stable States of Tidal Marsh Vegetation Patterns and Channel Complexity
ECOHYDROLOGY Ecohydrol. (2016) Published online in Wiley Online Library (wileyonlinelibrary.com) DOI: 10.1002/eco.1755 Alternative stable states of tidal marsh vegetation patterns and channel complexity K. B. Moffett1* and S. M. Gorelick2 1 School of the Environment, Washington State University Vancouver, Vancouver, WA, USA 2 Department of Earth System Science, Stanford University, Stanford, CA, USA ABSTRACT Intertidal marshes develop between uplands and mudflats, and develop vegetation zonation, via biogeomorphic feedbacks. Is the spatial configuration of vegetation and channels also biogeomorphically organized at the intermediate, marsh-scale? We used high-resolution aerial photographs and a decision-tree procedure to categorize marsh vegetation patterns and channel geometries for 113 tidal marshes in San Francisco Bay estuary and assessed these patterns’ relations to site characteristics. Interpretation was further informed by generalized linear mixed models using pattern-quantifying metrics from object-based image analysis to predict vegetation and channel pattern complexity. Vegetation pattern complexity was significantly related to marsh salinity but independent of marsh age and elevation. Channel complexity was significantly related to marsh age but independent of salinity and elevation. Vegetation pattern complexity and channel complexity were significantly related, forming two prevalent biogeomorphic states: complex versus simple vegetation-and-channel configurations. That this correspondence held across marsh ages (decades to millennia) -
Competitive Exclusion Principle
Competitive exclusion principle In ecology, the competitive exclusion principle,[1] sometimes referred to as Gause's law,[2] is a proposition named for Georgy Gause that two species competing for the same limited resource cannot coexist at constant population values. When one species has even the slightest advantage over another, the one with the advantage will dominate in the long term. This leads either to the extinction of the weaker competitor or to an evolutionary or behavioral shift toward a different ecological niche. The principle has been paraphrased in the maxim "complete competitors can not coexist".[1] 1: A smaller (yellow) species of bird forages Contents across the whole tree. 2: A larger (red) species competes for resources. History 3: Red dominates in the middle for the more abundant resources. Yellow adapts to a new Experimental basis niche restricted to the top and bottom of the tree, Prediction avoiding competition. Paradoxical traits Redefinition Phylogenetic context Application to humans See also References History The competitive exclusion principle is classically attributed to Georgii Gause,[3] although he actually never formulated it.[1] The principle is already present in Darwin's theory of natural selection.[2][4] Throughout its history, the status of the principle has oscillated between a priori ('two species coexisting must have different niches') and experimental truth ('we find that species coexisting do have different niches').[2] Experimental basis Based on field observations, Joseph Grinnell formulated the principle of competitive exclusion in 1904: "Two species of approximately the same food habits are not likely to remain long evenly balanced in numbers in the same region. -
Multiple Stable States and Regime Shifts - Environmental Science - Oxford Bibliographies 3/30/18, 10:15 AM
Multiple Stable States and Regime Shifts - Environmental Science - Oxford Bibliographies 3/30/18, 10:15 AM Multiple Stable States and Regime Shifts James Heffernan, Xiaoli Dong, Anna Braswell LAST MODIFIED: 28 MARCH 2018 DOI: 10.1093/OBO/9780199363445-0095 Introduction Why do ecological systems (populations, communities, and ecosystems) change suddenly in response to seemingly gradual environmental change, or fail to recover from large disturbances? Why do ecological systems in seemingly similar settings exhibit markedly different ecological structure and patterns of change over time? The theory of multiple stable states in ecological systems provides one potential explanation for such observations. In ecological systems with multiple stable states (or equilibria), two or more configurations of an ecosystem are self-maintaining under a given set of conditions because of feedbacks among biota or between biota and the physical and chemical environment. The resulting multiple different states may occur as different types or compositions of vegetation or animal communities; as different densities, biomass, and spatial arrangement; and as distinct abiotic environments created by the distinct ecological communities. Alternative states are maintained by the combined effects of positive (or amplifying) feedbacks and negative (or stabilizing feedbacks). While stabilizing feedbacks reinforce each state, positive feedbacks are what allow two or more states to be stable. Thresholds between states arise from the interaction of these positive and negative feedbacks, and define the basins of attraction of the alternative states. These feedbacks and thresholds may operate over whole ecosystems or give rise to self-organized spatial structure. The combined effect of these feedbacks is also what gives rise to ecological resilience, which is the capacity of ecological systems to absorb environmental perturbations while maintaining their basic structure and function. -
Ectomycorrhizal Fungal Communities at Forest Edges 93, 244–255 IAN A
Journal of Blackwell Publishing, Ltd. Ecology 2005 Ectomycorrhizal fungal communities at forest edges 93, 244–255 IAN A. DICKIE and PETER B. REICH Department of Forest Resources, University of Minnesota, St Paul, MN, USA Summary 1 Ectomycorrhizal fungi are spatially associated with established ectomycorrhizal vegetation, but the influence of distance from established vegetation on the presence, abundance, diversity and community composition of fungi is not well understood. 2 We examined mycorrhizal communities in two abandoned agricultural fields in Minnesota, USA, using Quercus macrocarpa seedlings as an in situ bioassay for ecto- mycorrhizal fungi from 0 to 20 m distance from the forest edge. 3 There were marked effects of distance on all aspects of fungal communities. The abundance of mycorrhiza was uniformly high near trees, declined rapidly around 15 m from the base of trees and was uniformly low at 20 m. All seedlings between 0 and 8 m distance from forest edges were ectomycorrhizal, but many seedlings at 16–20 m were uninfected in one of the two years of the study. Species richness of fungi also declined with distance from trees. 4 Different species of fungi were found at different distances from the edge. ‘Rare’ species (found only once or twice) dominated the community at 0 m, Russula spp. were dominants from 4 to 12 m, and Astraeus sp. and a Pezizalean fungus were abundant at 12 m to 20 m. Cenococcum geophilum, the most dominant species found, was abundant both near trees and distant from trees, with lowest relative abundance at intermediate distances. 5 Our data suggest that seedlings germinating at some distance from established ecto- mycorrhizal vegetation (15.5 m in the present study) have low levels of infection, at least in the first year of growth. -
A Global Method for Calculating Plant CSR Ecological Strategies Applied Across Biomes World-Wide
Functional Ecology 2016 doi: 10.1111/1365-2435.12722 A global method for calculating plant CSR ecological strategies applied across biomes world-wide Simon Pierce*,1, Daniel Negreiros2, Bruno E. L. Cerabolini3, Jens Kattge4, Sandra Dıaz5, Michael Kleyer6, Bill Shipley7, Stuart Joseph Wright8, Nadejda A. Soudzilovskaia9, Vladimir G. Onipchenko10, Peter M. van Bodegom9, Cedric Frenette-Dussault7, Evan Weiher11, Bruno X. Pinho12, Johannes H. C. Cornelissen13, John Philip Grime14, Ken Thompson14, Roderick Hunt15, Peter J. Wilson14, Gabriella Buffa16, Oliver C. Nyakunga16,17, Peter B. Reich18,19, Marco Caccianiga20, Federico Mangili20, Roberta M. Ceriani21, Alessandra Luzzaro1, Guido Brusa3, Andrew Siefert22, Newton P. U. Barbosa2, Francis Stuart Chapin III23, William K. Cornwell24, Jingyun Fang25, Geraldo Wilson Fernandez2,26, Eric Garnier27, Soizig Le Stradic28, Josep Penuelas~ 29,30, Felipe P. L. Melo12, Antonio Slaviero16, Marcelo Tabarelli12 and Duccio Tampucci20 1Department of Agricultural and Environmental Sciences (DiSAA), University of Milan, Via G. Celoria 2, I-20133 Milan, Italy; 2Ecologia Evolutiva e Biodiversidade/DBG, ICB/Universidade Federal de Minas Gerais, CP 486, 30161-970 Belo Horizonte, MG, Brazil; 3Department of Theoretical and Applied Sciences, University of Insubria, Via J.H. Dunant 3, I-21100 Varese, Italy; 4Max Planck Institute for Biogeochemistry, P.O. Box 100164, 07701 Jena, Germany; 5Instituto Multidisciplinario de Biologıa Vegetal (CONICET-UNC) and FCEFyN, Universidad Nacional de Cordoba, Av. Velez Sarsfield 299, -
Conservation Ecology: Using Ants As Bioindicators
Table of Contents Using Ants as bioindicators: Multiscale Issues in Ant Community Ecology......................................................0 ABSTRACT...................................................................................................................................................0 INTRODUCTION.........................................................................................................................................0 SCALE DEPENDENCY IN ANT COMMUNITIES....................................................................................1 Functional groups .............................................................................................................................2 Regulation of diversity......................................................................................................................3 Measuring species richness and composition...................................................................................4 Estimating species richness...............................................................................................................6 IMPLICATIONS FOR THE USE OF ANTS AS BIOINDICATORS..........................................................8 Using functional groups to assess ecological change.......................................................................8 Assessing species diversity...............................................................................................................9 RESPONSES TO THIS ARTICLE.............................................................................................................10 -
Functional Ecology of Secondary Forests in Chiapas, Mexico
Functional ecology of secondary forests in Chiapas, Mexico Madelon Lohbeck AV2010-19 MWM Lohbeck Functional Ecology of Secondary forests in Chiapas, Mexico Master thesis Forest Ecology and Forest Management Group FEM 80439 and FEM 80436 April 2010, AV2010-19 Supervisors: Prof. Dr. Frans Bongers (Forest Ecology and Forest Management group, Centre for Ecosystem Studies, Wageningen University and Research centre, the Netherlands) Dr. Horacio Paz (Centro de Investigaciones en Ecosistemas, Universidad Nacional Autonóma de México, Mexico) All rights reserved. This work may not be copied in whole or in parts without the written permission of the supervisor. 2 Table of contents General introduction 5 Acknowledgements 8 Chapter 1: Environmental filtering of functional traits as a driver of 9 community assembly during secondary succession in tropical wet forest of Mexico Chapter 2. Functional traits related to changing environmental conditions during 27 secondary succession: Environmental filtering and the slow-fast continuum Chapter 3. Functional and species diversity in tropical wet forest succession 48 Chapter 4. Functional diversity as a tool in predicting community assembly 65 processes 3 List of tables and figures General introduction Figure 1: General overview of the study area in Chiapas, Mexico 6 Chapter 1 Table 1: Leaf trait abbreviations and descriptions 13 Figure 1: Pathmodel showing the causal relations between age, stand 15 structure, environment and functional traits Figure 2: Stand structure in time since abandonment 15 Figure 3: -
Curriculum Vitae Fulbright Postdoctoral Fellow Soil and Fungal
1 LOUISE M. EGERTON-WARBURTON Curriculum Vitae Chicago Botanic Garden Phone: 847.835.6915 1000 Lake Cook Rd Fax: 847.835.5484 Glencoe IL 60022 [email protected] EDUCATION: Fulbright Postdoctoral Fellow University of California, 1994- Soil and fungal ecology Riverside 1997 Ph.D., Environmental Biology Curtin University of 1994 Dissertation: Soil-plant relationships of Eucalyptus species Technology, Australia in acidic coal mining soils. Adviser: Byron B. Lamont B.S., Biology (Highest Honors) Curtin University of 1989 Minor: Statistics Technology, Australia B.S., Nursing Western Australian School 1984 Clinical specialty: Operating Theater of Nursing APPOINTMENTS: Director and Coordinator, Research Experiences for Chicago Botanic Garden 2004- Undergraduates (REU) site in Plant Conservation and 2010 Biology Adjunct Professor of Biology Northwestern University 2003- present Conservation Scientist, Chicago Botanic Garden 2001- Soil and Microbial Ecology, and present Manager, Soil Sciences Program Assistant Researcher, University of California, 1999- Soil Microbial Ecology Riverside 2001 Post-doctoral Research Fellow, University of Melbourne, 1998- Cell & Molecular Biology, Nanotechnology Australia 1999 TEACHING APPOINTMENTS: Instructor, §Field and Lab Methods in Conservation Northwestern University 2009- Biology (PBC499) present Instructor, §Soils and Environment (PBC448), Northwestern University 2008- Fall quarter present Guest lecturer, Introductory Mycology University of Wisconsin, 2008 Winter quarter Madison 2 Guest lecturer, -
Functional Island Biogeography: the Next Frontier in Island Biology
Functional island biogeography: the next frontier in island biology Holger Kreft∗1,2 1Centre of Biodiversity and Sustainable Land Use, University of G¨ottingen{ B¨usgenweg 1 37077 G¨ottingen,Germany 2Biodiversity, Macroecology Biogeography, University of G¨ottingen{ B¨usgenweg 1. 37077 G¨ottingen, Germany Abstract Island biota exhibit a fascinating diversity of form and function, and the specular morpho- logical and behavioral oddities of island species compared to mainland relatives have received considerable scientific interest. Interestingly, all influential theories in island biogeography including the Equilibrium Theory and the General Dynamic Model of Island Biogeography do not consider such differences in species traits but instead treat all species as functionally equivalent. Such an ecologically neutral perspective clearly represents an oversimplification of the nature of island biota and limits our ability to understand the complex interplay of processes underpinning the distribution and diversity of island species and to predict how island species are affected by global environmental change. The large body of literature that exists on traits associated with dispersal and colonization, island syndromes (e.g. derived island woodiness, disharmony) or convergent trait evolution on different islands, however, currently lacks a coherent framework. Here, we argue that islands are particularly suited for a trait-based approach to study how different dispersal and environmental filters shape species assemblages at different spatial scales and how functional diversity emerges over time. We propose functional island biogeography, as an emerging sub-discipline that studies the distribution and composition of traits and functional diversity of island organisms across different organizational levels, and argue that this approach has great potential to link cur- rently disparate areas of island research at the interface of functional ecology, biogeography and evolutionary biology. -
Putting Constraints on the Role of Competition in Limiting Diversity In
Curriculum Vitae - Bryan Latimer Foster Department of Ecology and Evolutionary Biology / Kansas Biological Survey University of Kansas Lawrence, KS 66045 785-864-3346, [email protected] EEB Faculty page: http://www2.ku.edu/~eeb/faculty/foster.shtml Lab Website: http://kbs.ku.edu/people/staff_www/foster/index.htm EDUCATION 1996 Ph.D. Botany and Plant Pathology, Michigan State University. Advisor: Katherine Gross 1992 M.S. Zoology, Michigan State University. Advisor: Katherine Gross 1989 B.S. Range Science, Texas A&M University. Advisor: Fred Smeins PROFFESSIONAL APPOINTMENTS 2012-present Professor, Dept. of Ecology and Evolutionary Biology, University of Kansas 2012-present Senior Scientist, Kansas Biological Survey 2005-2011 Associate Professor, Dept. of Ecology and Evolutionary Biology, University of Kansas 1999-2005 Assistant Professor, Dept. of Ecology and Evolutionary Biology, University of Kansas 1997-1999 Postdoctoral Fellow, Dept. of Ecology, Evolution and Behavior, University of Minnesota. Advisor: David Tilman 1996-1997 Postdoctoral Researcher, Kellogg Biological Station, Michigan State University. Advisor: Katherine Gross, Mike Klug RESEARCH EXPERTISE Community Ecology, Restoration Ecology COURSES TAUGHT Principles of Ecology (BIOL 414) Community and Ecosystems Ecology (BIOL 714) Field and Laboratory Methods in Ecology (BIOL 415) Plant Ecology (BIOL 602) Field and Laboratory Exercises in Plant Ecology (BIOL 607) Biodiversity and Ecosystem Function (BIOL 701 graduate seminar) Species Coexistence and Community Organization (BIOL 701 graduate seminar) Ecological Applications (BIOL 701 graduate seminar) Community Ecology (BIOL 701 graduate seminar) Restoration Ecology (BIOL 701 graduate seminar) EXTERNAL FUNDING 2010-2015. NSF-Population and Community Ecology ($580,362). Plant recruitment, coexistence and community assembly in developing prairie restorations. PI: B. -
Disturbance Ecology and Forest Management: a Review of the Literature
United States Department of Agriculture Disturbance Ecology and Forest Service Intermountain Forest Management: a Research Station General Technical Review of the Literature Report INT-GTR-336 May 1996 Paul Rogers The Author Forest Service has adopted a policy of ecosystem management that emphasizes maintaining the values of sustainability, biodiver- Paul Rogers is an ecologist in the Interior West Resource Inven- sity, productivity, and forest health rather than focusing on particu- tory, Monitoring, and Evaluation Program at the Intermountain lar deliverable products. Research Station. His primary responsibility is to conduct field work In the attempt to implement ecosystem management, land and report on Forest Health Monitoring efforts in the Interior West. managers are asking basic scientific questions that go far beyond He holds a B.S. degree in geography from Utah State University the scope of historical Forest Service research. Concurrent with and an M.S. degree in geography from the University of Wisconsin- this demand are budgets being slashed and research positions Madison. Since beginning his career with the Forest Service in being eliminated. Land managers are being asked to implement 1987, Rogers has specialized in conducting large-scale field and new knowledge-intensive programs at a time when resources are remote vegetative surveys. being dramatically reduced. To address this significant dilemma, we need to re-evaluate how research is conducted within the Forest Service and how more effectively to involve partners from Research Summary the research community. Land managers are incorporating ecosystem perspectives into As a part of this effort, we have established an Intermountain their local and regional management decisions.