Unifying sources and sinks in ecology andEarth sciences
... limiting nutrients, toxic pollutants, or living organisms and its global consequences requires thorough knowledge of the multiple pathways through which living and non-living entities transform into each other and move in space. Increasingly the paired concepts of sources and sinks are used in the e ...
... limiting nutrients, toxic pollutants, or living organisms and its global consequences requires thorough knowledge of the multiple pathways through which living and non-living entities transform into each other and move in space. Increasingly the paired concepts of sources and sinks are used in the e ...
Herbivory enhances the diversity of primary producers in pond
... experiments (Lubchenco 1978, Paine 1996) and models of predator- mediated coexistence (e.g., Holt et al. 1994, Leibold 1996, Thingstad 2000) suggest that natural enemies could diversify assemblages of their resources. Enemy-induced mortality allows more resistant prey to coexist with otherwise sup ...
... experiments (Lubchenco 1978, Paine 1996) and models of predator- mediated coexistence (e.g., Holt et al. 1994, Leibold 1996, Thingstad 2000) suggest that natural enemies could diversify assemblages of their resources. Enemy-induced mortality allows more resistant prey to coexist with otherwise sup ...
Identifying the effectiveness and constraints of conservation
... 2008) and all values are given with standard errors. ...
... 2008) and all values are given with standard errors. ...
Back to Jeopardy - Warren County Public Schools
... with one another and their environment? Answer ...
... with one another and their environment? Answer ...
Abiotic vs. Biotic Influences on Habitat Selection of Coexisting
... coexisting species. Global climate change impacts have been considered largely in terms of simple distributional shifts, but these results indicate that shifts can also increase biotic costs when species move into habitat types for which they are poorly adapted or that create new biotic interactions ...
... coexisting species. Global climate change impacts have been considered largely in terms of simple distributional shifts, but these results indicate that shifts can also increase biotic costs when species move into habitat types for which they are poorly adapted or that create new biotic interactions ...
Biology - Weebly
... The attempt by organisms of the same or different species to use a resource at the same time in the same place is called a. competition. b. predation. c. symbiosis. d. cooperation. ...
... The attempt by organisms of the same or different species to use a resource at the same time in the same place is called a. competition. b. predation. c. symbiosis. d. cooperation. ...
Presence of mammalian predators decreases tolerance to human
... South Atlantic island of Saint Helena, feral cats accounted for 67% (12/18) of remotely monitored nest predations of the St Helena Plover Charadrius sanctahelenae (Burns FE, unpublished data), and in New Zealand, feral cats are major predators of adults, juveniles, and nests of the Double-banded Plo ...
... South Atlantic island of Saint Helena, feral cats accounted for 67% (12/18) of remotely monitored nest predations of the St Helena Plover Charadrius sanctahelenae (Burns FE, unpublished data), and in New Zealand, feral cats are major predators of adults, juveniles, and nests of the Double-banded Plo ...
Forest edges and habitat selection in birds: a functional approach
... more detailed discussions of these interactions the reader is referred to recent reviews (e.g., Paton 1994, Andrén 1995). These three effects are briefly considered below. Competition Competition is an area which has been neglected in studies of edge effects, a reflection of the inherent difficultie ...
... more detailed discussions of these interactions the reader is referred to recent reviews (e.g., Paton 1994, Andrén 1995). These three effects are briefly considered below. Competition Competition is an area which has been neglected in studies of edge effects, a reflection of the inherent difficultie ...
Interspecific Competition and Species Co
... we agreethatitwillbe difficult to expected. discernthe effectsof competition on biogeographic one cangenerate Alternatively, an expecteddistribu- patterns froma community-wide analysis.In fact,we tion of exclusivity thataccountsforspecies-areare- said exactlythat". . . statisticaltestsof properlypos ...
... we agreethatitwillbe difficult to expected. discernthe effectsof competition on biogeographic one cangenerate Alternatively, an expecteddistribu- patterns froma community-wide analysis.In fact,we tion of exclusivity thataccountsforspecies-areare- said exactlythat". . . statisticaltestsof properlypos ...
Large Copper Action Plan
... have been made to re-establish populations in by introducing one of the European subspecies. The bivoltine sub species L. d. rutilus was introduced to Wicken Fen, Cambridgeshire, in 1909 (Verrall, 1909) and following years with little success; to Greenfields, Co. Tipperary in 1913 and 1914 by E.B. P ...
... have been made to re-establish populations in by introducing one of the European subspecies. The bivoltine sub species L. d. rutilus was introduced to Wicken Fen, Cambridgeshire, in 1909 (Verrall, 1909) and following years with little success; to Greenfields, Co. Tipperary in 1913 and 1914 by E.B. P ...
Biodiversity Research
... of life. It is one of the very characteristics of animated nature to keep producing new forms – some successful, some less so; some rare, some widespread; some durable, some short-lived. But the ongoing quest for the fundamental laws of nature was intensely focused on that which is uniform and unive ...
... of life. It is one of the very characteristics of animated nature to keep producing new forms – some successful, some less so; some rare, some widespread; some durable, some short-lived. But the ongoing quest for the fundamental laws of nature was intensely focused on that which is uniform and unive ...
Understanding Our Environment
... Predation - A predator is an organism that feeds directly upon another living organism, whether or not it kills the prey in doing so. Prey most successfully on slowest, weakest, least fit members of target population. - Reduce competition, population overgrowth, and stimulate natural selection. ...
... Predation - A predator is an organism that feeds directly upon another living organism, whether or not it kills the prey in doing so. Prey most successfully on slowest, weakest, least fit members of target population. - Reduce competition, population overgrowth, and stimulate natural selection. ...
Key Threatening Process Nomination Form
... Research has shown a greater abundance and diversity of native mammals in areas that contain dingoes in comparison to those that exclude dingoes due to the fence; in the latter greater numbers of foxes and kangaroos have been found to occur (Newsome et al., 2001; Letnic et al., 2009a, 2009b; Letnic ...
... Research has shown a greater abundance and diversity of native mammals in areas that contain dingoes in comparison to those that exclude dingoes due to the fence; in the latter greater numbers of foxes and kangaroos have been found to occur (Newsome et al., 2001; Letnic et al., 2009a, 2009b; Letnic ...
Comparing small mammal faunas based on barn owl (Tyto alba
... Methods of owl pellet analysis The collected material included whole pellets as well as pellet fragments/debris in many cases. This is important to note because prey lists were compiled based on whole pellets on the one hand and relying on whole pellets plus pellet debris on the other. Taxonomic sma ...
... Methods of owl pellet analysis The collected material included whole pellets as well as pellet fragments/debris in many cases. This is important to note because prey lists were compiled based on whole pellets on the one hand and relying on whole pellets plus pellet debris on the other. Taxonomic sma ...
Bison are a keystone species for ecosystem restoration
... fire resistant (Collins and Barber 1986). The combined effect of bison wallows is an increase in spatial environmental heterogeneity and local and regional biodiversity (Hartnett et al. 1997). ...
... fire resistant (Collins and Barber 1986). The combined effect of bison wallows is an increase in spatial environmental heterogeneity and local and regional biodiversity (Hartnett et al. 1997). ...
A mechanistic model of the effects of light and temperature on algal
... curve parameters is complicated by the fact that they may change as algae adapt to varying environmental conditions. Light intensity, temperature and nutrient concentrations are known to influence the light harvesting efficiency of algae (Davison, 1991; Falkowski and LaRoche, 1991; Turpin, 1991). Th ...
... curve parameters is complicated by the fact that they may change as algae adapt to varying environmental conditions. Light intensity, temperature and nutrient concentrations are known to influence the light harvesting efficiency of algae (Davison, 1991; Falkowski and LaRoche, 1991; Turpin, 1991). Th ...
Local diversity of arable weeds increases with landscape
... (landscape sectors of 1 km diameter), PC 1 was positively correlated with soil acidity (42.1% explained variance). PC 2 was positively correlated with the local and regional perimeter–area ratio, the habitat-type diversity and the soil content of organic carbon and negatively correlated with the per ...
... (landscape sectors of 1 km diameter), PC 1 was positively correlated with soil acidity (42.1% explained variance). PC 2 was positively correlated with the local and regional perimeter–area ratio, the habitat-type diversity and the soil content of organic carbon and negatively correlated with the per ...
Chapter 37 - Cloudfront.net
... • Interspecific competition may play a major role in structuring a community – Two species competing for the same limited resource – May inhibit growth of one or both species ...
... • Interspecific competition may play a major role in structuring a community – Two species competing for the same limited resource – May inhibit growth of one or both species ...
Classifying Threats to Biodiversity
... Dextrase and Mandrak (2006) examined the specific impacts of alien invasive species on freshwater fauna based on information presented in COSEWIC status reports. In North America, extinction rates for freshwater fauna are five times higher than those for terrestrial groups (Ricciardi and Rasmussen, ...
... Dextrase and Mandrak (2006) examined the specific impacts of alien invasive species on freshwater fauna based on information presented in COSEWIC status reports. In North America, extinction rates for freshwater fauna are five times higher than those for terrestrial groups (Ricciardi and Rasmussen, ...
Experiments with the wild at the Oostvaardersplassen
... controlled environment and worlds they purport to model; theoretically rendering laboratory research inconsequential to the world out there. They also police who can contribute to and contest the production of natural knowledge. But the standardisation of laboratory spaces allows scientists at diver ...
... controlled environment and worlds they purport to model; theoretically rendering laboratory research inconsequential to the world out there. They also police who can contribute to and contest the production of natural knowledge. But the standardisation of laboratory spaces allows scientists at diver ...
A River Runs Through It: Riverine Systems Ecology and Restoration
... This meeting would not have been possible without the hard work of many board members and members from the Society for Northwestern Vertebrate Biology. Thank you to all who contributed to meeting planning and session coordination. Thank you, too, to all who presented posters and presentations. We wo ...
... This meeting would not have been possible without the hard work of many board members and members from the Society for Northwestern Vertebrate Biology. Thank you to all who contributed to meeting planning and session coordination. Thank you, too, to all who presented posters and presentations. We wo ...
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.