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Abies Bracteata Revised 2011 1 Abies Bracteata (D. Don) Poit
Lead Forest: Los Padres National Forest Forest Service Endemic: No Abies bracteata (D. Don) Poit. (bristlecone fir) Known Potential Synonym: Abies venusta (Douglas ex Hook.) K. Koch; Pinus bracteata D. Don; Pinus venusta Douglas ex Hook (Tropicos 2011). Table 1. Legal or Protection Status (CNDDB 2011, CNPS 2011, and Other Sources). Federal Listing Status; State Heritage Rank California Rare Other Lists Listing Status Plant Rank None; None G2/S2.3 1B.3 USFS Sensitive Plant description: Abies bracteata (Pinaceae) (Fig. 1) is a perennial monoecious plant with trunks longer than 55 m and less than 1.3 m wide. The branches are more-or-less drooping, and the bark is thin. The twigs are glabrous, and the buds are 1-2.5 cm long, sharp-pointed, and non- resinous. The leaves are less than 6 cm long, are dark green, faintly grooved on their upper surfaces, and have tips that are sharply spiny. Seed cones are less than 9 cm long with stalks that are under15 mm long. The cones have bracts that are spreading, exserted, and that are 1.5–4.5 cm long with a slender spine at the apex. Taxonomy: Abies bracteata is a fir species and a member of the pine family (Pinaceae). Out of the fir species growing in North America (Griffin and Critchfield 1976), Abies bracteata has the smallest range and is the least abundant. Identification: Many features of A. bracteata can be used to distinguish this species from other conifers, including the sharp-tipped needles, thin bark, club-shaped crown, non-resinous buds, and exserted spine tipped bracts (Gymnosperms Database 2010). -
Polyploid Plants Have Faster Rates of Multivariate Niche Differentiation Than Their Diploid Relatives
Ecology Letters, (2020) 23: 68–78 doi: 10.1111/ele.13402 LETTER Polyploid plants have faster rates of multivariate niche differentiation than their diploid relatives Abstract Anthony E. Baniaga,1* Polyploid speciation entails substantial and rapid postzygotic reproductive isolation of nascent Hannah E. Marx,1,2 Nils Arrigo1,3 species that are initially sympatric with one or both parents. Despite strong postzygotic isolation, and Michael S. Barker1 ecological niche differentiation has long been thought to be important for polyploid success. Using biogeographic data from across vascular plants, we tested whether the climatic niches of The peer review history for this arti- polyploid species are more differentiated than their diploid relatives and if the climatic niches of cle is available at https://publons. polyploid species differentiated faster than those of related diploids. We found that polyploids are com/publon/10.1111/ele.13402. often more climatically differentiated from their diploid parents than the diploids are from each other. Consistent with this pattern, we estimated that polyploid species generally have higher rates of multivariate niche differentiation than their diploid relatives. In contrast to recent analyses, our results confirm that ecological niche differentiation is an important component of polyploid speci- ation and that niche differentiation is often significantly faster in polyploids. Keywords Climatic niche, niche breadth, polyploid, speciation, sympatric speciation. Ecology Letters (2020) 23: 68–78 isolation from their progenitors, while also sympatric and INTRODUCTION competing with either one or both parental species (Ramsey Among vascular plants, polyploidy or whole genome duplica- & Schemske 1998, 2002). Mathematical models indicate that tion (WGD) is associated with an estimated 15–30% of speci- polyploid establishment is promoted by high selfing rates, ation events (Wood et al. -
Serpentine Soil Endemics in the California Flora Occur in Barer Serpentine Habitats with Lower Soil Calcium Levels Than Serpentine Tolerators
RESEARCH ARTICLE Adaptation and divergence in edaphic specialists and generalists: serpentine soil endemics in the California flora occur in barer serpentine habitats with lower soil calcium levels than serpentine tolerators Shelley A. Sianta1,2 and Kathleen M. Kay1 Manuscript received 4 December 2018; revision accepted 19 March PREMISE: Adaptation to harsh edaphic substrates has repeatedly led to the evolution of 2019. edaphic specialists and generalists. Yet, it is unclear what factors promote specialization 1 Department of Ecology and Evolutionary Biology, University of versus generalization. Here, we search for habitat use patterns associated with California, Santa Cruz, California serpentine endemics (specialists) and serpentine tolerators (generalists) to indirectly 2 Author for correspondence (e-mail: [email protected]) test the hypothesis that trade- offs associated with serpentine adaptation promote Citation: Sianta, S. A. and K. M. Kay. 2019. Adaptation and divergence specialization. We predict that (1) endemics have adapted to chemically harsher and more in edaphic specialists and generalists: serpentine soil endemics in the California flora occur in barer serpentine habitats with lower soil bare serpentine habitats than tolerators, and (2) edaphic endemics show more habitat calcium levels than serpentine tolerators. American Journal of Botany divergence from their sister species than tolerators do among on- and off- serpentine 106(5): 690–703. populations. doi:10.1002/ajb2.1285 METHODS: We selected 8 serpentine endemic and 9 serpentine tolerator species representing independent adaptation to serpentine. We characterized soil chemistry and microhabitat bareness from one serpentine taxon of each species and from a paired nonserpentine sister taxon, resulting in 8 endemic and 9 tolerator sister- taxa pairs. -
Peripatric Speciation Andrew Z
WikiJournal of Science, 2018, 1(2):8 doi: 10.15347/wjs/2018.008 Encyclopedic Review Article Peripatric speciation Andrew Z. Colvin* et al. Abstract Peripatric speciation is a mode of speciation in which a new species is formed from an isolated peripheral popu- lation.[1]:105 Since peripatric speciation resembles allopatric speciation, in that populations are isolated and pre- vented from exchanging genes, it can often be difficult to distinguish between them.[2] Nevertheless, the primary characteristic of peripatric speciation proposes that one of the populations is much smaller than the other. The terms peripatric and peripatry are often used in biogeography, referring to organisms whose ranges are closely adjacent but do not overlap, being separated where these organisms do not occur—for example on an oceanic island compared to the mainland. Such organisms are usually closely related (e.g. sister species); their distribution being the result of peripatric speciation. The concept of peripatric speciation was first outlined by the evolutionary biologist Ernst Mayr in 1954.[3] Since then, other alternative models have been developed such as centrifugal speciation, that posits that a species' pop- ulation experiences periods of geographic range expansion followed by shrinking periods, leaving behind small isolated populations on the periphery of the main population. Other models have involved the effects of sexual selection on limited population sizes. Other related models of peripherally isolated populations based on chromo- somal rearrangements have been developed such as budding speciation and quantum speciation. The existence of peripatric speciation is supported by observational evidence and laboratory experiments.[1]:106 Scientists observing the patterns of a species biogeographic distribution and its phylogenetic relationships are able to reconstruct the historical process by which they diverged. -
Phylogeny of Hawaiian Melicope (Rutaceae): RAD-Seq Resolves Species Relationships and Reveals Ancient Introgression
ORIGINAL RESEARCH published: 17 September 2019 doi: 10.3389/fpls.2019.01074 Phylogeny of Hawaiian Melicope (Rutaceae): RAD-seq Resolves Species Relationships and Reveals Ancient Introgression Claudia Paetzold 1*, Kenneth R. Wood 2, Deren A. R. Eaton 3,4, Warren L. Wagner 5 and Marc S. Appelhans 1,5 1 Department of Systematics, Biodiversity and Evolution of Plants (with Herbarium), University of Göttingen, Goettingen, Germany, 2 National Tropical Botanical Garden, Kalaheo, HI, United States, 3 Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, NY, USA, 4 Department of Ecology, Evolution, and Environmental Biology, Columbia University, New York, NY, United States, 5 Department of Botany, Smithsonian Institution, Washington, DC, United States Hawaiian Melicope are one of the major adaptive radiations of the Hawaiian Islands comprising 54 endemic species. The lineage is monophyletic with an estimated crown age predating the rise of the current high islands. Phylogenetic inference based on Sanger sequencing has not been sufficient to resolve species or deeper Edited by: level relationships. Here, we apply restriction site-associated DNA sequencing (RAD- Gonzalo Nieto Feliner, Real Jardín Botánico (RJB), seq) to the lineage to infer phylogenetic relationships. We employ Quartet Sampling to Spain assess information content and statistical support, and to quantify discordance as well Reviewed by: as partitioned ABBA-BABA tests to uncover evidence of introgression. Our new results Ya Yang, University of Minnesota drastically improved resolution of relationships within Hawaiian Melicope. The lineage is Twin Cities, United States divided into five fully supported main clades, two of which correspond to morphologically Mario Fernández-Mazuecos, circumscribed infrageneric groups. -
Serpentine Endemism in the California Flora: a Database of Serpentine Affinity
MADRONÄ O, Vol. 52, No. 4, pp. 222±257, 2005 SERPENTINE ENDEMISM IN THE CALIFORNIA FLORA: A DATABASE OF SERPENTINE AFFINITY H. D. SAFFORD1,2,J.H.VIERS3, AND S. P. HARRISON2 1 USDA-Forest Service, Paci®c Southwest Region, 1323 Club Drive, Vallejo, CA 94592 [email protected] 2 Department of Environmental Science and Policy, University of California, Davis, CA 95616 3 Information Center for the Environment, DESP, University of California, Davis, CA 95616 ABSTRACT We present a summary of a database documenting levels of af®nity to ultrama®c (``serpentine'') sub- strates for taxa in the California ¯ora, USA. We constructed our database through an extensive literature search, expert opinion, ®eld observations, and intensive use of accession records at key herbaria. We developed a semi-quantitative methodology for determining levels of serpentine af®nity (strictly endemic, broadly endemic, strong ``indicator'', etc.) in the California ¯ora. In this contribution, we provide a list of taxa having high af®nity to ultrama®c/serpentine substrates in California, and present information on rarity, geographic distribution, taxonomy, and lifeform. Of species endemic to California, 12.5% are restricted to ultrama®c substrates. Most of these taxa come from a half-dozen plant families, and from only one or two genera within each family. The North Coast and Klamath Ranges support more serpentine endemics than the rest of the State combined. 15% of all plant taxa listed as threatened or endangered in California show some degree of association with ultrama®c substrates. Information in our database should prove valuable to efforts in ecology, ¯oristics, biosystematics, conservation, and land management. -
Polyploid Plants Have Faster Rates of Multivariate Climatic Niche Evolution Than Their Diploid
bioRxiv preprint doi: https://doi.org/10.1101/406314; this version posted September 1, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. 1 Title 2 Polyploid plants have faster rates of multivariate climatic niche evolution than their diploid 3 relatives 4 5 Authors and affiliations 6 Anthony E. Baniaga¹*, Hannah E. Marx¹, Nils Arrigo¹², Michael S. Barker¹ 7 8 ¹Department of Ecology & Evolutionary Biology, University of Arizona, Tucson, AZ, USA 9 ²Department of Ecology & Evolution, University of Lausanne, Switzerland 10 11 [email protected] 12 [email protected] 13 [email protected] 14 [email protected] 15 16 Short running title Climatic niche evolution of polyploid plants 17 18 Keywords [10 words] 19 climatic niche, evolutionary rates, niche breadth, polyploid, speciation, sympatric speciation 20 21 Statement of Authorship: AB and MS conceived of project, AB and NA generated the dataset, 22 AB and HM performed analyses, AB and MS cowrote manuscript. 23 24 Data Accessibility Statement: Upon acceptance all necessary R scripts, data, and files 25 supporting the results will be archived on FigShare with the data DOI included at the end of the 26 article. 1 bioRxiv preprint doi: https://doi.org/10.1101/406314; this version posted September 1, 2018. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. -
A Comparison of Hemlzonla Conjugens (Otay Tarplant) with Two Closely Related Tarplant Species Using Enzyme Electrophoresls and Soil Textural Analysis
A comparison of Hemlzonla conJugens (Otay tarplant) with two closely related tarplant species using enzyme electrophoresls and soil textural analysis FINAL REPORT Prepared by: Ellen T. Bauder, Ph D and David Truesdale, Ph D Department of Biology San Diego State University San Diego, CA 92182-4614 Prepared for: California Department of Fish and Game Region 5 Natural Community Conservation Planning Program David Lawhead, Contract Manager 4949 Viewrldge Avenue San Diego, CA 92123 Contract # FG 7186 ES February 2000 © CONTENTS CONTENTS......................................................................................................................... i i TABLES ............................................................................................................................. i ii FIGURES ............................................................................................................................ i ii A_OWLEDGMENTS ........................................................................................................ i v ABSTHACT......................................................................................................................... v CHAPTER 1. INTRODUCTION............................................................................................ 1 1,1. PURPOSE OF THE PROJECT.......................................................................... 1 1.2. LOCATIONOFTHE STUDY ............................................................................. 2 1.3, BACKGROUND ON THE SPECIES ................................................................... -
The Edaphic Factor in the Origin of Plant Species
Rajakaruna. 2004. Published in International Geology Review. 46:471-478. The Edaphic Factor in the Origin of Plant Species NISHANTA RAJAKARUNA1 Department of Biological Sciences, Stanford University, Stanford, California 94305-5020 Abstract Although speciation has been a central focus in evolutionary biology for more than a century, there are very few case studies where we have a good understanding of the exact forces that may have acted in the diversification of a group of organisms. In order to examine such forces, botanists have often focused on closely related plants that are found under contrasting soil conditions. The study of such edaphically differentiated plants has provided valuable insight to the role of natural selection in evolution. This paper discusses several key studies that have appeared in the literature in the last half century emphasizing the role unusual soil conditions—such as those found on serpentinite out- crops, mine tailings, guano deposits, and salt flats—can play in the diversification of plant species. Many of these studies have not only shown adaptive differentiation in response to various edaphic features, but have also attempted to examine the link between adaptive traits and traits that are directly responsible for reproductive isolation between the divergent taxa. With the advent of novel genetic techniques and an increased understanding of the genetic architecture of various adaptive traits dealing with substrate tolerance, it will soon be possible to demonstrate the central role of the edaphic factor in plant evolution. Introduction mineral nutrients and much of its water supply. It involves physical, chemical, and biological proper- The red-rock forest may seem hellish to us, ties of soils (Mason, 1946a, 1946b). -
10Th International Conference on Serpentine Ecology, Eketerinburg, Russia (June 21-30)
10th International Conference on Serpentine Ecology, Eketerinburg, Russia (June 21-30) Abstracts Accepted Presenter/s in BOLD; Cal Poly Students Underlined 1) Devlin, M.C., Stephens, D., Negoita, L., and N. Rajakaruna. 2020. Impacts of Multiple Nutrient Element Enrichment on Native and Alien Plant Species in California’s Serpentine Grasslands. Oral presentation at the 10th International Conference on Serpentine Ecology, Ekaterinburg, Russia. June 21-30. Abstract: Nitrogen and phosphorus additions are linked to increased invasion of non-native plants onto serpentine soils. However, effects of combined N+P enrichment have not been thoroughly investigated. We grew two non-native annuals and two native annuals in serpentine soil to test competitive interactions under different nutrient addition treatments. Treatments included nitrogen (N), phosphorous (P), and N+P additions based on realistic current and future deposition rates. We ran five replicates of each treatment. After twelve weeks we measured seed mass, floret production, above ground biomass, and below ground biomass of each plant as indicators of competitive success. We used a mixed-model approach and tested for significant interactions between nativity and soil nutrient additions using likelihood-ratio model comparisons. We found that 1) N+P addition significantly increased seed mass in non-native species compared to natives (χ2 (1)=14.42, P < 0.001), 2) N+P addition significantly increased above ground biomass in non-native species compared to natives (χ2 (1)=7.33, P < 0.01), and 3) P addition significantly increased seed mass in non-native species compared to natives (χ2 (1)=5.04, P < 0.05). Phosphorous addition also showed a marginally significant interaction effect with inflorescence number (χ2 (1)=4.03, P = 0.045). -
Evolutionary Shifts Associated with Substrate Endemism in the Western American Flora
Evolutionary Shifts Associated with Substrate Endemism in the Western American Flora By Adam Christopher Schneider A dissertation submitted in partial satisfaction of the Requirements for the degree of Doctor of Philosophy in Integrative Biology in the Graduate Division of the University of California, Berkeley Committee in charge: Professor Bruce Baldwin, Chair Professor Brent Mishler Professor Kip Will Summer 2017 Evolutionary Shifts Associated with Substrate Endemism in the Western American Flora Copyright © 2017 by Adam Christopher Schneider Abstract Evolutionary Shifts Associated with Substrate Endemism in the Western American Flora by Adam Christopher Schneider Doctor of Philosophy in Integrative Biology University of California, Berkeley Professor Bruce G. Baldwin, Chair This study investigated how habitat specialization affects the evolution and ecology of flowering plants. Specifically, a phylogenetic framework was used to investigate how trait evolution, lineage diversification, and biogeography of the western American flora are affected by two forms of substrate endemism: (1) edaphic specialization onto serpentine soils, and (2) host specialization of non-photosynthetic, holoparasitic Orobanchaceae. Previous studies have noted a correlation between presence on serpentine soils and a suite of morphological and physiological traits, one of which is the tendency of several serpentine-tolerant ecotypes to flower earlier than nearby closely related populations not growing on serpentine. A phylogenetically uncorrected ANOVA supports this hypothesis, developed predominantly through previously published comparisons of conspecific or closely related ecotypes. However, comparisons among three models of trait evolution, as well as phylogenetic independent contrasts across 24 independent clades of plants that include serpentine tolerant species in California and with reasonably resolved phylogenies, revealed no significant affect of flowering time in each of these genera. -
University of California Santa Cruz
UNIVERSITY OF CALIFORNIA SANTA CRUZ ADAPTIVE DIVERGENCE AND SPECIATION IN THE CALIFORNIA SERPENTINE FLORA A dissertation submitted in partial satisfaction of the requirements for the degree of DOCTOR OF PHILOSOPHY in ECOLOGY AND EVOLUTIONARY BIOLOGY by Shelley A. Sianta September 2019 The Dissertation of Shelley A. Sianta is approved: ________________________________ Professor Kathleen M. Kay, Chair ________________________________ Professor Ingrid M. Parker ________________________________ Professor Beth Shapiro ________________________________ Professor Sharon Y. Strauss ________________________________ Professor Nishanta Rajakaruna ________________________________ Quentin Williams Acting Vice Provost and Dean of Graduate Studies Copyright Ó by Shelley A. Sianta 2015 TABLE OF CONTENTS Page List of Tables and Figures v Abstract viii Acknowledgements xi Statement of contribution xv General Introduction 1 Bibliography………………………………………………...13 Chapter 1: Adaptation and divergence in edaphic specialists and generalists: serpentine soil endemics in the California flora occur in barer serpentine habitats with lower soil calcium levels than serpentine tolerators 18 Bibliography………………………………………………...53 Tables……………………………….……………….............63 Figures………………………………………………............65 Appendix…………………………………………................70 Chapter 2: Across the speciation continuum: genetically-based flowering time shifts evolve early in speciation following adaptation to serpentine soils 79 Bibliography………………………………………………...113 Tables………………………………………………..............121