The Cronus hypothesis – extinction as a necessary and dynamic
... Abstract The incredible diversity of life on Earth veils the tumultuous history of biodiversity loss over deep time. Six mass extinction events since the Cambrian species explosion (including the current Anthropocene), and many smaller extinction spasms, have terminated 99 % of all species that have ...
... Abstract The incredible diversity of life on Earth veils the tumultuous history of biodiversity loss over deep time. Six mass extinction events since the Cambrian species explosion (including the current Anthropocene), and many smaller extinction spasms, have terminated 99 % of all species that have ...
More closely related species are more ecologically similar in an
... (21). Some studies find evidence for phylogenetic signal in niche characteristics (22), whereas others find that important aspects of the niche are highly labile with respect to ancestry (23, 24). With few exceptions, these studies are observational (25, 26), and there has been a call for more experim ...
... (21). Some studies find evidence for phylogenetic signal in niche characteristics (22), whereas others find that important aspects of the niche are highly labile with respect to ancestry (23, 24). With few exceptions, these studies are observational (25, 26), and there has been a call for more experim ...
Plant species traits and capacity for resource reduction predict yield
... where monoculture plots were established to measure R* for five grass species, and pairwise competition plots were established to determine competitive superiority. Soil nitrate concentrations in monoculture were used as a direct measure of R* in these N-limited field experiments. There were signifi ...
... where monoculture plots were established to measure R* for five grass species, and pairwise competition plots were established to determine competitive superiority. Soil nitrate concentrations in monoculture were used as a direct measure of R* in these N-limited field experiments. There were signifi ...
Guidance for Restoration Activities in Riparian Areas
... natural riparian areas. Pits that hold water during wet periods, mounds that dry out more quickly, and variable slope gradients provide a wide range of micro‐ habitats that support more species. In contrast, cleared riparian areas in settled landscapes are typically graded flat or have a smooth ...
... natural riparian areas. Pits that hold water during wet periods, mounds that dry out more quickly, and variable slope gradients provide a wide range of micro‐ habitats that support more species. In contrast, cleared riparian areas in settled landscapes are typically graded flat or have a smooth ...
Introduction to Natural Heritage
... • There are suggested notes for each slide in simple bullet point format. These cover the basics only of what needs to be explained about the content of each slide. • Each slide is a potential story in its own right. Therefore, in keeping with the exercise as a broad overview, notes and explanations ...
... • There are suggested notes for each slide in simple bullet point format. These cover the basics only of what needs to be explained about the content of each slide. • Each slide is a potential story in its own right. Therefore, in keeping with the exercise as a broad overview, notes and explanations ...
Species diversity and dominance-richness relationships for ground
... Namibia has high levels of invertebrate endemism, but biodiversity research has been geographically and taxonomically restricted. In South African savannah, species richness of ground-foraging ant assemblages is regulated by dominant ant species. However, this pattern has not been tested in other ar ...
... Namibia has high levels of invertebrate endemism, but biodiversity research has been geographically and taxonomically restricted. In South African savannah, species richness of ground-foraging ant assemblages is regulated by dominant ant species. However, this pattern has not been tested in other ar ...
High vulnerability of ecosystem function and services to diversity
... cervicornis and A. palmata) from disease in the 1980s virtually eliminated entire ecological functions, namely the control of macroalgae by invertebrate grazers and the provision of complex threedimensional habitat by live branching corals (Roff and Mumby, 2012). Under currently low sea urchin abund ...
... cervicornis and A. palmata) from disease in the 1980s virtually eliminated entire ecological functions, namely the control of macroalgae by invertebrate grazers and the provision of complex threedimensional habitat by live branching corals (Roff and Mumby, 2012). Under currently low sea urchin abund ...
SUCCESSION, PHENOMENON OF
... The Clementsian succession paradigm had a pronounced effect on ecology in the United States in the first half of the twentieth century (much less so in Europe), and it shaped many of the laws and policies on the use of public lands. Earlier ecologists developed some of these ideas, and others evolved ...
... The Clementsian succession paradigm had a pronounced effect on ecology in the United States in the first half of the twentieth century (much less so in Europe), and it shaped many of the laws and policies on the use of public lands. Earlier ecologists developed some of these ideas, and others evolved ...
Ecological Heterogeneity in the Effects of Grazing and Fire on
... determines grassland species composition and productivity within our study region. On most soils in California, native bunchgrasses and forbs have been replaced by annual grasses and forbs from the Mediterranean region (Heady 1977; Mooney et al. 1986). This transformation may have been aided by chan ...
... determines grassland species composition and productivity within our study region. On most soils in California, native bunchgrasses and forbs have been replaced by annual grasses and forbs from the Mediterranean region (Heady 1977; Mooney et al. 1986). This transformation may have been aided by chan ...
Foothill Yellow-Legged Frog (Rana boylii)
... Habitat loss and degradation, introduction of exotic predators, and toxic chemicals (including pesticides) pose continued and increasing threats to the long-term viability amphibians throughout California (Jennings and Hayes 1994). In addition, poorly timed water releases from upstream reservoirs ca ...
... Habitat loss and degradation, introduction of exotic predators, and toxic chemicals (including pesticides) pose continued and increasing threats to the long-term viability amphibians throughout California (Jennings and Hayes 1994). In addition, poorly timed water releases from upstream reservoirs ca ...
Final Report 10/10/2012 Key West Botanical Garden EPAC grant
... needing research into the underlying drivers of this habitat. Based on field observations by K. Bradley and S. Hodges, these habitats seem to occur in two different locations. The first of these are barrens that occur in small areas along ecotones between buttonwood dominated forests with salt toler ...
... needing research into the underlying drivers of this habitat. Based on field observations by K. Bradley and S. Hodges, these habitats seem to occur in two different locations. The first of these are barrens that occur in small areas along ecotones between buttonwood dominated forests with salt toler ...
Competition among native and invasive Impatiens species: the roles
... hand, the outcome of interactions with resident organisms, especially competition (Levine et al. 2004), have been repeatedly found to be important for successful invasion of local communities (Sakai et al. 2001; Levine et al. 2004; Vilà and Weiner 2004; Maherali and Klironomos 2007; Hierro et al. 2 ...
... hand, the outcome of interactions with resident organisms, especially competition (Levine et al. 2004), have been repeatedly found to be important for successful invasion of local communities (Sakai et al. 2001; Levine et al. 2004; Vilà and Weiner 2004; Maherali and Klironomos 2007; Hierro et al. 2 ...
3.14 Biological Resources
... endangered species are required to obtain authorization from NMFS and/or USFWS through either Section 7 (interagency consultation) or Section 10(a) (incidental take permit) of ESA, depending on whether the federal government is involved in permitting or funding the project. The Section 7 authorizati ...
... endangered species are required to obtain authorization from NMFS and/or USFWS through either Section 7 (interagency consultation) or Section 10(a) (incidental take permit) of ESA, depending on whether the federal government is involved in permitting or funding the project. The Section 7 authorizati ...
Invasive Species - South Bay Salt Pond Restoration Project
... Invasive species have had a major impact on the ecology of the San Francisco Bay. Tidal mudflats and shallow water habitats are almost entirely composed of introduced species, and native species are rarely found in abundance (Nichols and Thompson, 1985; Thompson and Shouse, 2002; Shouse and Thompson ...
... Invasive species have had a major impact on the ecology of the San Francisco Bay. Tidal mudflats and shallow water habitats are almost entirely composed of introduced species, and native species are rarely found in abundance (Nichols and Thompson, 1985; Thompson and Shouse, 2002; Shouse and Thompson ...
chapter03_section01_edit
... Observing is often the first step in asking ecological questions. Some observations are simple. Others are complex and may form the first step in designing experiments and models. ...
... Observing is often the first step in asking ecological questions. Some observations are simple. Others are complex and may form the first step in designing experiments and models. ...
Species-specific effects of genetic diversity and species
... crowns, this set-up enabled us to study communities of interacting trees. The 12 species were randomly assigned to three species pools of four species each, with the restriction that pools contained both evergreen and deciduous species (two each in two pools, one deciduous and three evergreen specie ...
... crowns, this set-up enabled us to study communities of interacting trees. The 12 species were randomly assigned to three species pools of four species each, with the restriction that pools contained both evergreen and deciduous species (two each in two pools, one deciduous and three evergreen specie ...
Flora – Nationally Vulnerable species
... (http://www..nt.gov.au/nreta/wildlife/animals/threatened/pdf/birds/australian_bustard_ vu.pdf) ........................................................................................................................... 24 Conservation status .......................................................... ...
... (http://www..nt.gov.au/nreta/wildlife/animals/threatened/pdf/birds/australian_bustard_ vu.pdf) ........................................................................................................................... 24 Conservation status .......................................................... ...
LESSER PRAIRIE CHICKEN Crude Oil and Natural Gas
... In Oklahoma, the Lesser Prairie Chicken (LPC) and its habitat are located in areas where oil and gas (O&G) development is occurring. The U.S. Fish and Wildlife (USFWS) has determined that listing the LPC as threatened under the Endangered Species Act (ESA) is warranted but precluded because of other ...
... In Oklahoma, the Lesser Prairie Chicken (LPC) and its habitat are located in areas where oil and gas (O&G) development is occurring. The U.S. Fish and Wildlife (USFWS) has determined that listing the LPC as threatened under the Endangered Species Act (ESA) is warranted but precluded because of other ...
This talk will be about patterns of species diversity
... According to Magurran (2004), there are 3 general categories for measuring β diversity. Most of these are based on presence/absence data. 1. Methods that examine the extent of the difference between two or more areas of α diversity relative to γ diversity, where γ diversity is measured as total spec ...
... According to Magurran (2004), there are 3 general categories for measuring β diversity. Most of these are based on presence/absence data. 1. Methods that examine the extent of the difference between two or more areas of α diversity relative to γ diversity, where γ diversity is measured as total spec ...
The relevance of non-farmland habitats, uncropped areas and
... Use of non-farmland habitats by species generally perceived as ‘farmland birds’ is common, yet these habitats are not always considered in conservation strategies aimed at population recovery. At the national scale, many farmland species occur in landscapes not dominated by farmland. An analysis of ...
... Use of non-farmland habitats by species generally perceived as ‘farmland birds’ is common, yet these habitats are not always considered in conservation strategies aimed at population recovery. At the national scale, many farmland species occur in landscapes not dominated by farmland. An analysis of ...
Comparative Analysis of Diversity and Similarity Indices with Special
... used to monitor pollution, changes in biotic communities and so-called ‘environmental standards’ or ‘quality of the environment’. Environmental indices include those that are based on physical and chemical parameters, those based on biological parameters and also those based on perceived aesthetic q ...
... used to monitor pollution, changes in biotic communities and so-called ‘environmental standards’ or ‘quality of the environment’. Environmental indices include those that are based on physical and chemical parameters, those based on biological parameters and also those based on perceived aesthetic q ...
Reconciliation ecology
Reconciliation ecology is the branch of ecology which studies ways to encourage biodiversity in human-dominated ecosystems. Michael Rosenzweig first articulated the concept in his book Win-Win Ecology, based on the theory that there is not enough area for all of earth’s biodiversity to be saved within designated nature preserves. Therefore, humans should increase biodiversity in human-dominated landscapes. By managing for biodiversity in ways that do not decrease human utility of the system, it is a ""win-win"" situation for both human use and native biodiversity. The science is based in the ecological foundation of human land-use trends and species-area relationships. It has many benefits beyond protection of biodiversity, and there are numerous examples of it around the globe. Aspects of reconciliation ecology can already be found in management legislation, but there are challenges in both public acceptance and ecological success of reconciliation attempts.