Clonal selection prevents tragedy of the commons when neighbors
... they invade one another. In the case when all species have similar mutation rates, we observe a perpetual arms race where no single species prevails. When only two species mutate, their aggressions increase indefinitely until the ecosystem collapses and only the nonmutating species survives. Finally ...
... they invade one another. In the case when all species have similar mutation rates, we observe a perpetual arms race where no single species prevails. When only two species mutate, their aggressions increase indefinitely until the ecosystem collapses and only the nonmutating species survives. Finally ...
High proportion of cactus species threatened with extinction
... been evaluated against the current IUCN Red List Criteria2. Moreover, global species assessments, in which the extinction risk of every extant species in a taxonomic group is systematically assessed, have been conducted only for very few plant groups (such as cycads, conifers, mangroves, sea grasses ...
... been evaluated against the current IUCN Red List Criteria2. Moreover, global species assessments, in which the extinction risk of every extant species in a taxonomic group is systematically assessed, have been conducted only for very few plant groups (such as cycads, conifers, mangroves, sea grasses ...
ppt
... Combinations of different plants can be planted at higher density, and they use different "niches" and coexist. Even if abundance of "most productive" species, drops, this loss can be offset. ...
... Combinations of different plants can be planted at higher density, and they use different "niches" and coexist. Even if abundance of "most productive" species, drops, this loss can be offset. ...
assessment
... re-survey areas in eastern Cuba to determine current populations and assess trends. Conduct censuses of the species during the breeding season to determine the breeding range of the species and to identify sites to protect. Protect nesting sites and areas of suitable habitat where the species has hi ...
... re-survey areas in eastern Cuba to determine current populations and assess trends. Conduct censuses of the species during the breeding season to determine the breeding range of the species and to identify sites to protect. Protect nesting sites and areas of suitable habitat where the species has hi ...
Changes in habitat heterogeneity alter marine sessile benthic
... resilience that allows them to be maintained for years, if not indefinitely, by interacting physical and biological processes (e.g., Osman and Whitlatch 1998, 2004, 2007). However, switches between states occur over time periods of months to years over equally variable spatial scales (R. Osman and R. ...
... resilience that allows them to be maintained for years, if not indefinitely, by interacting physical and biological processes (e.g., Osman and Whitlatch 1998, 2004, 2007). However, switches between states occur over time periods of months to years over equally variable spatial scales (R. Osman and R. ...
ppt
... Now, if we put these isocline together, we can describe the possible outcomes of pairwise competition. The effects are more interesting if the isoclines cross. There is now a point of intersection, where BOTH populations have a nonzero equilibrium. This is competitive coexistence. And it is stable - ...
... Now, if we put these isocline together, we can describe the possible outcomes of pairwise competition. The effects are more interesting if the isoclines cross. There is now a point of intersection, where BOTH populations have a nonzero equilibrium. This is competitive coexistence. And it is stable - ...
Flinders Ranges Purple-spotted Gudgeon
... Ranges in rocky stream habitat areas that are maintained by springs thought to come from local rock aquifers. In other areas of the Flinders Ranges they can be found in isolated water holes along rocky creeks. They can only move to new areas during flooding events. They prefer slow flowing to still ...
... Ranges in rocky stream habitat areas that are maintained by springs thought to come from local rock aquifers. In other areas of the Flinders Ranges they can be found in isolated water holes along rocky creeks. They can only move to new areas during flooding events. They prefer slow flowing to still ...
The influence of interspecific interactions on species range
... expansion rates, consider examples from empirical studies of biological invasions and natural range expansions as well as process-based simulations, and discuss how interspecific interactions can be more broadly represented in process-based, spatiotemporally explicit range forecasts. Theory tells us ...
... expansion rates, consider examples from empirical studies of biological invasions and natural range expansions as well as process-based simulations, and discuss how interspecific interactions can be more broadly represented in process-based, spatiotemporally explicit range forecasts. Theory tells us ...
The origin of troglobites
... plausible non-allopatric models of speciation have recently been proposed by a number of authors and are reviewed by White (1978). One model, proposed by Endler (1977) may be applied to caves thus: The genocline which exists within a long-established troglophilic species (Fig. 33: J in our model) wo ...
... plausible non-allopatric models of speciation have recently been proposed by a number of authors and are reviewed by White (1978). One model, proposed by Endler (1977) may be applied to caves thus: The genocline which exists within a long-established troglophilic species (Fig. 33: J in our model) wo ...
BIL 161 Research Project: Biodiversity in Local Ecosystems and
... An essential part of undertaking a research project is to find out what is already known about your area of interest, why it is important, relevant. Previous research might give you ideas about what questions still need to be addressed in this area. For example, you might be interested in finding ou ...
... An essential part of undertaking a research project is to find out what is already known about your area of interest, why it is important, relevant. Previous research might give you ideas about what questions still need to be addressed in this area. For example, you might be interested in finding ou ...
Slajd 1
... ecological patterns and processes in space and time Important: The focus is on explanation and model building and not on simple description. Modern ecology is not a faunistic or floristic exercise. It uses larges scale data sets to build and verify its theories about the causes of observed patterns. ...
... ecological patterns and processes in space and time Important: The focus is on explanation and model building and not on simple description. Modern ecology is not a faunistic or floristic exercise. It uses larges scale data sets to build and verify its theories about the causes of observed patterns. ...
Top-predator abundance and chaos in tritrophic food chains
... (Strogatz 1994) and, indeed, they have been produced through bifurcation analysis, combining the theory of normal forms with powerful numerical continuation techniques (Kuznetsov 1995). The function z (p 1, p 2) is discontinuous on a bifurcation curve if the bifurcation is catastrophic. In Fig. 2 so ...
... (Strogatz 1994) and, indeed, they have been produced through bifurcation analysis, combining the theory of normal forms with powerful numerical continuation techniques (Kuznetsov 1995). The function z (p 1, p 2) is discontinuous on a bifurcation curve if the bifurcation is catastrophic. In Fig. 2 so ...
Chapter 5 - Mr. Carlson`s Science 8
... D. Parasitism, mutualism, and commensalism. 1. Parasites live on or in another species. The host of this arrangement is obviously harmed by it, but the parasite can contribute to biodiversity by controlling the size of specific species populations. 2. Mutualism is a relationship that benefits both ...
... D. Parasitism, mutualism, and commensalism. 1. Parasites live on or in another species. The host of this arrangement is obviously harmed by it, but the parasite can contribute to biodiversity by controlling the size of specific species populations. 2. Mutualism is a relationship that benefits both ...
Round 2 for Butterflies - Conserve Wildlife Foundation
... from the Delaware. I assume there was historically more good vegetated habitat (e.g., which supported longnose gar), the bowfin would likely have been historically more common if it were present. With the intensity of different types of fisheries (e.g., gill nets for shad), it should have been detec ...
... from the Delaware. I assume there was historically more good vegetated habitat (e.g., which supported longnose gar), the bowfin would likely have been historically more common if it were present. With the intensity of different types of fisheries (e.g., gill nets for shad), it should have been detec ...
Short Exam Study Guides for Biogeography
... identify major time & space constraints on the living with examples; 4) discuss major biological influences on the distribution of organisms; 5) discuss trophic levels in the biosphere, 6) discuss global climate as the primary control on the distribution life; 7) highland biogeography & human activi ...
... identify major time & space constraints on the living with examples; 4) discuss major biological influences on the distribution of organisms; 5) discuss trophic levels in the biosphere, 6) discuss global climate as the primary control on the distribution life; 7) highland biogeography & human activi ...
Lab 12: Cladistics
... Ecology is the study of how organisms affect, and are affected by, biotic (living) and abiotic (nonliving) factors. This week we focus on biotic interactions, which can be divided into (1) interactions among individuals of the same species, and (2) interactions among organisms of different species. ...
... Ecology is the study of how organisms affect, and are affected by, biotic (living) and abiotic (nonliving) factors. This week we focus on biotic interactions, which can be divided into (1) interactions among individuals of the same species, and (2) interactions among organisms of different species. ...
Known knowns and unknowns in biology
... Here we present a knowledge-data framework based on the politico-military statement by Donald Rumsfeld (below) which has, we believe, direct relevance to ecological conservation. Ecological examples of four of the identified categories are provided with discussion of the conservation risks to a spec ...
... Here we present a knowledge-data framework based on the politico-military statement by Donald Rumsfeld (below) which has, we believe, direct relevance to ecological conservation. Ecological examples of four of the identified categories are provided with discussion of the conservation risks to a spec ...
2006 - University of Arizona | Ecology and Evolutionary Biology
... 27. What lifestyle choices have the biggest effect on an individual’s ecological footprint? 28. Why is the ecological footprint different for different countries even if you plug in the same values on the footprint website? 29. Define Aldo Leopold’s Land Ethic. 30. Define NEPA, EIS, FONSI, EA, and H ...
... 27. What lifestyle choices have the biggest effect on an individual’s ecological footprint? 28. Why is the ecological footprint different for different countries even if you plug in the same values on the footprint website? 29. Define Aldo Leopold’s Land Ethic. 30. Define NEPA, EIS, FONSI, EA, and H ...
The Importance of Biological Diversity to Human Health
... many small populations—each of which is highly vulnerable to extinction even when quite large total areas of habitat remain. This creates the central dilemma of conservation biology: species are constantly going extinct locally, but usually only receive major attention when the remaining few individ ...
... many small populations—each of which is highly vulnerable to extinction even when quite large total areas of habitat remain. This creates the central dilemma of conservation biology: species are constantly going extinct locally, but usually only receive major attention when the remaining few individ ...
Ant species richness and evenness increase along a
... of species richness and evenness with increasing pollution. Simpson’s index decreased while the slopes of rank-abundance curves increased with Zn concentration, both indicating a decrease of species dominance with increasing pollution (Simpson index: P ¼ 0.008, r ¼ 0.636; slopes of rank-abundance cu ...
... of species richness and evenness with increasing pollution. Simpson’s index decreased while the slopes of rank-abundance curves increased with Zn concentration, both indicating a decrease of species dominance with increasing pollution (Simpson index: P ¼ 0.008, r ¼ 0.636; slopes of rank-abundance cu ...
Hearing in Geometrid Moths
... this nonacoustic B-cell [7] has not been described in geometrids, but it may have the same function as the Bcell in noctuid moths, where it seems to be a stretch receptor [12]. All the tested geometrid species had broadly tuned audiograms with BF and thresholds at BF comparable those of noctuoid mot ...
... this nonacoustic B-cell [7] has not been described in geometrids, but it may have the same function as the Bcell in noctuid moths, where it seems to be a stretch receptor [12]. All the tested geometrid species had broadly tuned audiograms with BF and thresholds at BF comparable those of noctuoid mot ...
Understanding Bering Sea Groundfish Populations
... Schematic diagrams showing alternative hypotheses on how cold climate may affect distribution of fish on the eastern Bering Sea shelf and predation on young pollock. The cold pool (blue) is a pool of cold water (< 2°C) on the Bering Sea shelf formed by melting sea ice. In cold years, the cold pool c ...
... Schematic diagrams showing alternative hypotheses on how cold climate may affect distribution of fish on the eastern Bering Sea shelf and predation on young pollock. The cold pool (blue) is a pool of cold water (< 2°C) on the Bering Sea shelf formed by melting sea ice. In cold years, the cold pool c ...