assessment
... to east in Queensland. The species may have been eliminated from some breeding areas early in the 20th century (Olsen 1998) but this perception is questionable because it was based on data that include observations and materials in specimen collections (including eggs) that may not pertain to the sp ...
... to east in Queensland. The species may have been eliminated from some breeding areas early in the 20th century (Olsen 1998) but this perception is questionable because it was based on data that include observations and materials in specimen collections (including eggs) that may not pertain to the sp ...
Biojeopardy: Ecology
... territorial or compete for the same resources often. (example is birds’ nesting habits) ...
... territorial or compete for the same resources often. (example is birds’ nesting habits) ...
press release here.
... of Animal Ecology. http://onlinelibrary.wiley.com/doi/10.1111/13652656.12310/full The authors are: Sarah R. Hoy, Steve J. Petty, Alexandre Millon, D. Philip Whitfield, Michael Marquiss, Martin Davison and Xavier Lambin Published in an ecological journal with one of the highest impact factors, this o ...
... of Animal Ecology. http://onlinelibrary.wiley.com/doi/10.1111/13652656.12310/full The authors are: Sarah R. Hoy, Steve J. Petty, Alexandre Millon, D. Philip Whitfield, Michael Marquiss, Martin Davison and Xavier Lambin Published in an ecological journal with one of the highest impact factors, this o ...
Species - HCC Learning Web
... Fusion: Weakening Reproductive Barriers • If hybrids are as fit as parents, there can be substantial gene flow between species • If gene flow is great enough, the parent species can fuse into a single species – For example, researchers think that pollution in Lake Victoria has reduced the ability o ...
... Fusion: Weakening Reproductive Barriers • If hybrids are as fit as parents, there can be substantial gene flow between species • If gene flow is great enough, the parent species can fuse into a single species – For example, researchers think that pollution in Lake Victoria has reduced the ability o ...
Competition with Fisheries
... Competitive interactions between marine mammal populations and fisheries can either be “direct” or “indirect.” In the former case, the two groups share a common prey species whereas in the latter case, e.g., a marine mammal may prey on a species that is also an important component of the diet of a co ...
... Competitive interactions between marine mammal populations and fisheries can either be “direct” or “indirect.” In the former case, the two groups share a common prey species whereas in the latter case, e.g., a marine mammal may prey on a species that is also an important component of the diet of a co ...
Focus Factors affecting the expansion success of bird populations in
... Understanding the factors that limit the current distribution of species and populations is crucial not only for ecological and theoretical research but also for predicting the impact of global change on biodiversity and its consequences for effective management and conservation. Using as a study mo ...
... Understanding the factors that limit the current distribution of species and populations is crucial not only for ecological and theoretical research but also for predicting the impact of global change on biodiversity and its consequences for effective management and conservation. Using as a study mo ...
Golden eagles, feral pigs, and insular carnivores: How exotic
... ecosystem change and have been increasingly recognized as major concerns in the conservation of terrestrial ecosystems (1, 2). In cases where exotic species have caused biodiversity loss, their effects are typically manifested through direct species interactions in the form of predation, competition ...
... ecosystem change and have been increasingly recognized as major concerns in the conservation of terrestrial ecosystems (1, 2). In cases where exotic species have caused biodiversity loss, their effects are typically manifested through direct species interactions in the form of predation, competition ...
Everybody Eats - Lincoln Park Zoo
... animal predation. Try one of these Zoo Tracks activities in you classroom or neighborhood. Record what you discover in a science notebook like a zoologist would! Spend some time watching sparrows. Based on what they eat and the way they move, would you consider them predators or prey? Watch a dog ...
... animal predation. Try one of these Zoo Tracks activities in you classroom or neighborhood. Record what you discover in a science notebook like a zoologist would! Spend some time watching sparrows. Based on what they eat and the way they move, would you consider them predators or prey? Watch a dog ...
Stochastic competitive exclusion leads to a cascade of
... Recently, we focused on the influence of ecological drift on the similarity of coexisting species via the competitive exclusion principle (Capitán et al., 2015). In that contribution we showed that, in the presence of ecological drift, the maximum degree of similarity that ensures stable coexistenc ...
... Recently, we focused on the influence of ecological drift on the similarity of coexisting species via the competitive exclusion principle (Capitán et al., 2015). In that contribution we showed that, in the presence of ecological drift, the maximum degree of similarity that ensures stable coexistenc ...
Factors affecting Rocky Intertidal Zonation Patterns
... extreme high and low tides – Neap tides at half moons the sun and moon are working against each other so the tidal ranges are reduced – Springs and neaps occur twice each lunar cycle, or roughly twice a month (Fig. 12.3) ...
... extreme high and low tides – Neap tides at half moons the sun and moon are working against each other so the tidal ranges are reduced – Springs and neaps occur twice each lunar cycle, or roughly twice a month (Fig. 12.3) ...
352
... A good definition of primary succession is when life begins to grow in an area that previously did not support life. It is also defined as the type of succession that occurs where no ecosystem existed before. Primary succession can occur on rocks, cliffs, and sand dunes. Usually the first species to ...
... A good definition of primary succession is when life begins to grow in an area that previously did not support life. It is also defined as the type of succession that occurs where no ecosystem existed before. Primary succession can occur on rocks, cliffs, and sand dunes. Usually the first species to ...
Bengtsson, J., Nilsson, SG, Franc, A., and Menozzi, P. (2000).
... towards stable `climax' systems (e.g. Clements, 1936; Odum, 1969). This static view of nature has now given way for a more dynamic one in which change and disturbance are seen as natural features of ecosystems (e.g. White, 1979; Pickett and White, 1985; Botkin, 1990; Holling, 1992; Holling et al., 1 ...
... towards stable `climax' systems (e.g. Clements, 1936; Odum, 1969). This static view of nature has now given way for a more dynamic one in which change and disturbance are seen as natural features of ecosystems (e.g. White, 1979; Pickett and White, 1985; Botkin, 1990; Holling, 1992; Holling et al., 1 ...
File
... The common spiny mouse (Acomys cahirinus) and the golden spiny mouse (A. russatus) share similar microhabitats and food sources. o Where they co-occur, A. cahirinus is nocturnal (active at night), while A. russatus is diurnal (active during the day). o Laboratory researchers have found that A. russa ...
... The common spiny mouse (Acomys cahirinus) and the golden spiny mouse (A. russatus) share similar microhabitats and food sources. o Where they co-occur, A. cahirinus is nocturnal (active at night), while A. russatus is diurnal (active during the day). o Laboratory researchers have found that A. russa ...
Biodiversity and ecosystem stability: a synthesis of underlying
... Although at first sight this observation might seem to resolve the diversity–stability debate, from a theoretical angle it raises more questions than it provides answers. Traditional theory predicts that diversity and complexity should beget community instability (May 1973). What, then, explains the ...
... Although at first sight this observation might seem to resolve the diversity–stability debate, from a theoretical angle it raises more questions than it provides answers. Traditional theory predicts that diversity and complexity should beget community instability (May 1973). What, then, explains the ...
Community-wide character displacement in barnacles
... 2000a). Within each community, character displacement occurs among four genera, one in the order Pedunculata and three in Sessilia. Furthermore, the replacement of S. cariosus and C. dalli by T. s. rubescens and C. fissus between communities is consistent with the least common mode of character disp ...
... 2000a). Within each community, character displacement occurs among four genera, one in the order Pedunculata and three in Sessilia. Furthermore, the replacement of S. cariosus and C. dalli by T. s. rubescens and C. fissus between communities is consistent with the least common mode of character disp ...
Ecological Management factors associated with Wind Farms
... coatings are being considered. Utilising Bioactive Compounds from marine invertebrates (e.g. sponges) algae, and microorganisms, (produce to enhance their competitivity for space or to prevent other organisms settling on their surfaces and overgrowing them). Cyanobacteria produce a variety of bioact ...
... coatings are being considered. Utilising Bioactive Compounds from marine invertebrates (e.g. sponges) algae, and microorganisms, (produce to enhance their competitivity for space or to prevent other organisms settling on their surfaces and overgrowing them). Cyanobacteria produce a variety of bioact ...
- University of Gloucestershire
... insects, reptiles, birds, mammals, fish and crustacea), showed that, despite limited research into facilitative alien-native interactions, such interactions occur surprisingly frequently. Examples were found of introduced species acting as hosts, food sources, pollinators or seed dispersers for nati ...
... insects, reptiles, birds, mammals, fish and crustacea), showed that, despite limited research into facilitative alien-native interactions, such interactions occur surprisingly frequently. Examples were found of introduced species acting as hosts, food sources, pollinators or seed dispersers for nati ...
The effective factors on diversity of natural regeneration and
... Biodiversity that include diversity, variety, population structure, spatial pattern and distribution plants can be used to compare the ecological condition of forest ecosystems and it guarantee of flexibility and adaptationcapacity offorestecosystems (Le´veˆque andMoundolou, 2001, Alijanpour et al., ...
... Biodiversity that include diversity, variety, population structure, spatial pattern and distribution plants can be used to compare the ecological condition of forest ecosystems and it guarantee of flexibility and adaptationcapacity offorestecosystems (Le´veˆque andMoundolou, 2001, Alijanpour et al., ...
Canada Of lemmings and snowshoe hares: the
... and ermine (Mustela erminea) are important lemming predators that can operate under the snow. No data were available on how effective predator exclosures are in winter. Wilson et al. [19] observed a nearly equal population decline on control grids and the fenced grid over the winter. A major reason ...
... and ermine (Mustela erminea) are important lemming predators that can operate under the snow. No data were available on how effective predator exclosures are in winter. Wilson et al. [19] observed a nearly equal population decline on control grids and the fenced grid over the winter. A major reason ...
Biogeography - National Open University of Nigeria
... nature, ecosystems vary in size and can be studied at any scale. Ecosystems also vary continuously over space so that it is often difficult to define the spatial limits (boundaries) of ecosystems. It is a valuable concept for studying and understanding the components and functioning of the biosphere ...
... nature, ecosystems vary in size and can be studied at any scale. Ecosystems also vary continuously over space so that it is often difficult to define the spatial limits (boundaries) of ecosystems. It is a valuable concept for studying and understanding the components and functioning of the biosphere ...
Invasion and predation in aquatic ecosystems
... mental tank with green crabs extended their claws in an aggressive display, while the green crabs scuttled in and took the food (MacDonald et al., 2007). When fights took place over the food, the native C. sapidus was the “loser” a disproportionate number of times, despite their well-known aggressio ...
... mental tank with green crabs extended their claws in an aggressive display, while the green crabs scuttled in and took the food (MacDonald et al., 2007). When fights took place over the food, the native C. sapidus was the “loser” a disproportionate number of times, despite their well-known aggressio ...
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.