1 Invasive plants, insects, and diseases in the forests of the
... their proximity to busy eastern ports and in part because of the large number of tree species that can support a large number of species-specific invaders. In contrast, western interior forests have fewer different species of invasive insects, likely because of their distance from ports of entry and ...
... their proximity to busy eastern ports and in part because of the large number of tree species that can support a large number of species-specific invaders. In contrast, western interior forests have fewer different species of invasive insects, likely because of their distance from ports of entry and ...
Invasive species and biological invasions
... millions individuals. Attracted by its low price and small size at birth, many consumers bought these red-eared sliders Xavier Le Roux, BiodivERsA Coordinator and CEO as pet, not knowing that they can exceed 1.5 kg within 2-3 years. Many owners consequently released their turtles into the wild, wher ...
... millions individuals. Attracted by its low price and small size at birth, many consumers bought these red-eared sliders Xavier Le Roux, BiodivERsA Coordinator and CEO as pet, not knowing that they can exceed 1.5 kg within 2-3 years. Many owners consequently released their turtles into the wild, wher ...
TREE ECOLOGY THE ROLE OF TREES IN THE ECOSYSTEM
... The requirement for trees in woodland ecosystems is easy to understand. However trees also play an important role in non-woodland ecosystems. Open grown trees have a different crown framework to trees in woodlands; they often have wider crowns that extend lower than those found in woodlands. They ar ...
... The requirement for trees in woodland ecosystems is easy to understand. However trees also play an important role in non-woodland ecosystems. Open grown trees have a different crown framework to trees in woodlands; they often have wider crowns that extend lower than those found in woodlands. They ar ...
Species pool size and invasibility of island communities: a null
... richness per unit area, but the fact that an island community is a small sample from the set of potential species that can survive in a given set of habitat conditions. Therefore, invasibility of islands should primarily be framed in terms of differences in species pools of native species, not of di ...
... richness per unit area, but the fact that an island community is a small sample from the set of potential species that can survive in a given set of habitat conditions. Therefore, invasibility of islands should primarily be framed in terms of differences in species pools of native species, not of di ...
Gauging the impact of fishing mortality on non
... of converting the total catch-at-length distribution (or its proxy) from a steady-state fishery into estimates of population size and fishing mortality at size. Properly, its use requires an estimate of the steady-state catch-atlength distribution of the total catch together with model parameters de ...
... of converting the total catch-at-length distribution (or its proxy) from a steady-state fishery into estimates of population size and fishing mortality at size. Properly, its use requires an estimate of the steady-state catch-atlength distribution of the total catch together with model parameters de ...
Oceans Work Package 2 - hrsbstaff.ednet.ns.ca
... Healthy coral reefs provide a complex, three-dimensional habitat that promotes species diversity and abundance. The loss of sharks in a reef ecosystem, like that of the Caribbean Sea, can trigger a chain reaction that is felt throughout the entire food web, ultimately leading to the degradation of c ...
... Healthy coral reefs provide a complex, three-dimensional habitat that promotes species diversity and abundance. The loss of sharks in a reef ecosystem, like that of the Caribbean Sea, can trigger a chain reaction that is felt throughout the entire food web, ultimately leading to the degradation of c ...
migration - Princeton University
... allocation to support long-distance movements. Of course, not all migrants will show all five characteristics, but as a group these traits circumscribe the suite of distinct and specialized behaviors entailed in migration. To these behavioral attributes we add two functional hallmarks of migrations: ...
... allocation to support long-distance movements. Of course, not all migrants will show all five characteristics, but as a group these traits circumscribe the suite of distinct and specialized behaviors entailed in migration. To these behavioral attributes we add two functional hallmarks of migrations: ...
Diet of four small mammal species from Atlantic forest patches in
... Introduction arthropods seem to be the main food or relative importance, in the small Studies on diet of mammals are necessary to understand niche relationships, competitive process, coexistence, predation, and their influence on the ecosystem, as well as how resource distribution is affecting anima ...
... Introduction arthropods seem to be the main food or relative importance, in the small Studies on diet of mammals are necessary to understand niche relationships, competitive process, coexistence, predation, and their influence on the ecosystem, as well as how resource distribution is affecting anima ...
pdf - Scripps Institution of Oceanography
... extremely unstable, displaying limit-cycle or chaotic behaviour across much of their parameter space, even when the chains are persistent (i.e. all three species maintain population densities bounded away from zero indefinitely [Abrams & Roth 1994]). How generally other ecological factors such as sp ...
... extremely unstable, displaying limit-cycle or chaotic behaviour across much of their parameter space, even when the chains are persistent (i.e. all three species maintain population densities bounded away from zero indefinitely [Abrams & Roth 1994]). How generally other ecological factors such as sp ...
Biodiversity: an introduction - European Capitals of Biodiversity
... 2. Competition: When a new exploitable resource becomes available, individuals within a given population may benefit from choosing to specialise on only one resource (i.e. either the new or the original resource). Speciation can arise when the offspring of parents that specialise on the same resourc ...
... 2. Competition: When a new exploitable resource becomes available, individuals within a given population may benefit from choosing to specialise on only one resource (i.e. either the new or the original resource). Speciation can arise when the offspring of parents that specialise on the same resourc ...
Ecological morphospace of New World ants
... Genera for which there were no data on feeding type were removed from further analyses (see Appendix). Genera were assigned to a foraging stratum (subterranean, litter, or surface) using information gleaned from the literature, personal field observations, and other sources (e.g. the ants of La Selv ...
... Genera for which there were no data on feeding type were removed from further analyses (see Appendix). Genera were assigned to a foraging stratum (subterranean, litter, or surface) using information gleaned from the literature, personal field observations, and other sources (e.g. the ants of La Selv ...
Mechanical vulnerability explains sizedependent mortality of reef
... Modularity allows organisms to escape allometric constraints that limit the size of individual modules (Jackson 1979), and consequently an organism’s demographic contributions should be dependent on the number of modules (Hall & Hughes 1996). Modularity also introduces several life history possibili ...
... Modularity allows organisms to escape allometric constraints that limit the size of individual modules (Jackson 1979), and consequently an organism’s demographic contributions should be dependent on the number of modules (Hall & Hughes 1996). Modularity also introduces several life history possibili ...
Fisheries, Chaos and Ethics. A Note on India Status
... a dynamic balance) is due to Maynard Smith (1968), which argues that the populations either remain relatively constant or regularly vary around an alleged point of balance. In the specific case of commercial fisheries, biologists believe that the fishing effort is often relevant to explain the devia ...
... a dynamic balance) is due to Maynard Smith (1968), which argues that the populations either remain relatively constant or regularly vary around an alleged point of balance. In the specific case of commercial fisheries, biologists believe that the fishing effort is often relevant to explain the devia ...
Comparative growth rates and yields of ciliates and heterotrophic
... species studied here showed that there was no single explanation for this growth rate disparity. Heterotrophic dinoflagellates exhibited both low ingestion rates and, in one case, low yields; ciliates were able to achieve higher growth rates via either higher ingestion rates or higher yields, depend ...
... species studied here showed that there was no single explanation for this growth rate disparity. Heterotrophic dinoflagellates exhibited both low ingestion rates and, in one case, low yields; ciliates were able to achieve higher growth rates via either higher ingestion rates or higher yields, depend ...
EVS - Abdul Ahad Azad Memorial Degree College Bemina
... of the unity of organisms and environment can be traced back to very early biological literature. In 1877 Karl Mobius used term ‘biocoenosis’ and in 1887 S.A.Forbes used the term ‘microcosm’ for different types of ecosystems.The concept of ecosystem is a very broad one and emphasizes the obligatory ...
... of the unity of organisms and environment can be traced back to very early biological literature. In 1877 Karl Mobius used term ‘biocoenosis’ and in 1887 S.A.Forbes used the term ‘microcosm’ for different types of ecosystems.The concept of ecosystem is a very broad one and emphasizes the obligatory ...
BIOGEOGRAPHY 8
... (Williams 1964; Anderson and Marcus 1993). No two species will have identical spatial patterns, but if quadrats are too large or too widely separated, many species may show concordant distributions. These apparent "ties" will affect the power of null model tests of spatial pattern. Quadrat sampling ...
... (Williams 1964; Anderson and Marcus 1993). No two species will have identical spatial patterns, but if quadrats are too large or too widely separated, many species may show concordant distributions. These apparent "ties" will affect the power of null model tests of spatial pattern. Quadrat sampling ...
Trophic organization and food web structure of
... catastrophic flood periods and dry periods. A more moderating and comprehensive concept, the River Continuum Concept (RCC) w a s p r o p o s e d b y Va n n o t t e e t a l . ( 1 9 8 0 ) , which stated that the communities can be placed in between these two extremes, being organized and limited by d ...
... catastrophic flood periods and dry periods. A more moderating and comprehensive concept, the River Continuum Concept (RCC) w a s p r o p o s e d b y Va n n o t t e e t a l . ( 1 9 8 0 ) , which stated that the communities can be placed in between these two extremes, being organized and limited by d ...
Habitat Loss, Degradation, and Fragmentation
... (some generalizations) • Fragmentation typically leads to reduction of habitat connectivity and extent – species may/not adjust • Fragmented landscapes often have more features such as roads deleterious to biodiversity • Naturally patchy areas typically have rich internal patch structure, whereas fr ...
... (some generalizations) • Fragmentation typically leads to reduction of habitat connectivity and extent – species may/not adjust • Fragmented landscapes often have more features such as roads deleterious to biodiversity • Naturally patchy areas typically have rich internal patch structure, whereas fr ...
Dispersal traits determine plant response to habitat
... erroneous assessment of significant explanatory variables violating the assumption of independent samples (Legendre and Legendre 2006; Dormann et al. 2007). However it becomes more than a statistical issue in empirical studies regarding dispersal limitation. Spatially clustered plant species occurre ...
... erroneous assessment of significant explanatory variables violating the assumption of independent samples (Legendre and Legendre 2006; Dormann et al. 2007). However it becomes more than a statistical issue in empirical studies regarding dispersal limitation. Spatially clustered plant species occurre ...
Theoretical ecology
Theoretical ecology is the scientific discipline devoted to the study of ecological systems using theoretical methods such as simple conceptual models, mathematical models, computational simulations, and advanced data analysis. Effective models improve understanding of the natural world by revealing how the dynamics of species populations are often based on fundamental biological conditions and processes. Further, the field aims to unify a diverse range of empirical observations by assuming that common, mechanistic processes generate observable phenomena across species and ecological environments. Based on biologically realistic assumptions, theoretical ecologists are able to uncover novel, non-intuitive insights about natural processes. Theoretical results are often verified by empirical and observational studies, revealing the power of theoretical methods in both predicting and understanding the noisy, diverse biological world.The field is broad and includes foundations in applied mathematics, computer science, biology, statistical physics, genetics, chemistry, evolution, and conservation biology. Theoretical ecology aims to explain a diverse range of phenomena in the life sciences, such as population growth and dynamics, fisheries, competition, evolutionary theory, epidemiology, animal behavior and group dynamics, food webs, ecosystems, spatial ecology, and the effects of climate change.Theoretical ecology has further benefited from the advent of fast computing power, allowing the analysis and visualization of large-scale computational simulations of ecological phenomena. Importantly, these modern tools provide quantitative predictions about the effects of human induced environmental change on a diverse variety of ecological phenomena, such as: species invasions, climate change, the effect of fishing and hunting on food network stability, and the global carbon cycle.