Key - Scioly.org
... any scenario in which humans reduce the numbers of a species population because they disturb the human population, even if there are technically enough resources to support the species at current or higher levels (ie, the population is below the biological/ecological carrying capacity k) ...
... any scenario in which humans reduce the numbers of a species population because they disturb the human population, even if there are technically enough resources to support the species at current or higher levels (ie, the population is below the biological/ecological carrying capacity k) ...
ESA 2010 handbook - Ecological Society of Australia
... studying population and community dynamics of the boreal forest and tundra regions of western Canada. He is retired from the University of British Columbia and lives in Canberra during the northern winter. ...
... studying population and community dynamics of the boreal forest and tundra regions of western Canada. He is retired from the University of British Columbia and lives in Canberra during the northern winter. ...
Cirripedia: The Barnacles - Marine Biodiversity Center
... the Thoracica form intricate symbiotic associations with larger organisms such as whales, sea snakes, lobsters, medusae, corals, and sponges. A few have become nutritionally dependent on sharks, worms, or corals, which in earlier stages of their evolution they exploited simply for support or protect ...
... the Thoracica form intricate symbiotic associations with larger organisms such as whales, sea snakes, lobsters, medusae, corals, and sponges. A few have become nutritionally dependent on sharks, worms, or corals, which in earlier stages of their evolution they exploited simply for support or protect ...
Natural Organic Chemicals on Development
... invertebrates is the water fleas of the genus Daphnia. These animals are often the dominant herbivores in lakes and ponds. They play a key role in determining water clarity (by grazing on algae) and they are an important part of the diet of fish. Natural chemical signals (kairomones) produced by pre ...
... invertebrates is the water fleas of the genus Daphnia. These animals are often the dominant herbivores in lakes and ponds. They play a key role in determining water clarity (by grazing on algae) and they are an important part of the diet of fish. Natural chemical signals (kairomones) produced by pre ...
The Harm They Inflict When Values Conflict: Why Diversity Does not
... beings, have moral status and therefore their interests need to be considered when designing the management of natural processes. However, one of the difficult questions that arises after deciding that intervention is required is how we ought to intervene in such cases. What is the best policy of in ...
... beings, have moral status and therefore their interests need to be considered when designing the management of natural processes. However, one of the difficult questions that arises after deciding that intervention is required is how we ought to intervene in such cases. What is the best policy of in ...
Trophic cascades in Yellowstone: The first - UP FAMNIT e
... and only found at some sites and not others. Most authors attributed these plant responses, at least partially, to spatial variation in perceived predation risk; relatively risky sites received less browsing and experienced more plant growth. Perceived predation risk relates to prey antipredator beh ...
... and only found at some sites and not others. Most authors attributed these plant responses, at least partially, to spatial variation in perceived predation risk; relatively risky sites received less browsing and experienced more plant growth. Perceived predation risk relates to prey antipredator beh ...
- Wiley Online Library
... reduce availability of prey, i.e. extreme aridity and cave-dwelling, to insularity, strengthened the relationship to omnivory in Lacertidae and Lacertoidea. We were unable to demonstrate a role of aridity independent of insularity, but present anecdotal evidence suggests that it may promote evolutio ...
... reduce availability of prey, i.e. extreme aridity and cave-dwelling, to insularity, strengthened the relationship to omnivory in Lacertidae and Lacertoidea. We were unable to demonstrate a role of aridity independent of insularity, but present anecdotal evidence suggests that it may promote evolutio ...
fifty years of food and foraging in moose
... to harvest food, often selecting large bites as browse density declines. Finally, long-term monitoring of moose populations has provided evidence of how populations and communities are regulated. Low reproductive rates and long-term population trends shaped by moose density and forage availability o ...
... to harvest food, often selecting large bites as browse density declines. Finally, long-term monitoring of moose populations has provided evidence of how populations and communities are regulated. Low reproductive rates and long-term population trends shaped by moose density and forage availability o ...
The 10 % RULE
... The maximum amount of ENERGY that passes from one trophic level to the next is ...
... The maximum amount of ENERGY that passes from one trophic level to the next is ...
Our Natural Heritage, Bioregional Pride
... “Bioregions are geographic areas having common characteristics of soil, watershed, climate, native plants and animals that exist within the whole planetary biosphere as unique and intrinsic contributive parts. A bioregion refers both to geographical terrain and a terrain of consciousness—to a place ...
... “Bioregions are geographic areas having common characteristics of soil, watershed, climate, native plants and animals that exist within the whole planetary biosphere as unique and intrinsic contributive parts. A bioregion refers both to geographical terrain and a terrain of consciousness—to a place ...
Lecture Notes - Florida International University
... Distantly related taxa can come to resemble one another through the process of convergence Closely related taxa may quickly develop very different morpholgies through divergence Species may have diverged in the distant past can maintain similar morphologies through parallel evolution Adaptations ...
... Distantly related taxa can come to resemble one another through the process of convergence Closely related taxa may quickly develop very different morpholgies through divergence Species may have diverged in the distant past can maintain similar morphologies through parallel evolution Adaptations ...
COMPETITION AND MORPHOLOGICAL SIMILARITY: THE CASE ... THE "SNAKE-LIKE" LIZARDS ANGUIS FRAGILIS (ANGUIDAE) AND
... species of the old world, cf. Shine, 1 980), but there are also sorne interesting cases of species living in the same geographie regions which show this kind of morphological adaptation. When such species are sympatric, a potentially strong interspecific competition could be hypothesized (Williams, ...
... species of the old world, cf. Shine, 1 980), but there are also sorne interesting cases of species living in the same geographie regions which show this kind of morphological adaptation. When such species are sympatric, a potentially strong interspecific competition could be hypothesized (Williams, ...
The state of knowledge about insect pollination in Norway
... available information on species and habitat types. Information about interactions in nature is an important part of this task, but the complexity of such interactions makes them hard to investigate and describe. Insects which visit plants to find pollen and nectar, and plants which are dependent up ...
... available information on species and habitat types. Information about interactions in nature is an important part of this task, but the complexity of such interactions makes them hard to investigate and describe. Insects which visit plants to find pollen and nectar, and plants which are dependent up ...
Ameiurus natalis (Lesueur, 1819) - CIRCABC
... Ameiurus catus seems not to be established yet, but it´s presence was recently confirmed in Poland (Nowak, 2008) and UK (Britton, 2006). It seems that not only A. melas and A. nebulosus are able to establish self-sustaining populations in Europe. Further establishment in Great Britain of A. nebulosu ...
... Ameiurus catus seems not to be established yet, but it´s presence was recently confirmed in Poland (Nowak, 2008) and UK (Britton, 2006). It seems that not only A. melas and A. nebulosus are able to establish self-sustaining populations in Europe. Further establishment in Great Britain of A. nebulosu ...
The Protozoa
... kingdom status with 18 phyla based on the structure of mitochondrial cristae and other characteristics (see section 19.7). The acceptance of this new classification by protozoologists, however, remains to be determined. In recent molecular classification schemes, the protozoa do not exist as a discr ...
... kingdom status with 18 phyla based on the structure of mitochondrial cristae and other characteristics (see section 19.7). The acceptance of this new classification by protozoologists, however, remains to be determined. In recent molecular classification schemes, the protozoa do not exist as a discr ...
Wolverine - Saskatchewan Conservation Data Centre
... 2003). Most wolverines become sexually mature at two to three years of age (Species at Risk 2010). Wolverines’ exhibit delayed implantation which allows the females to breed in summer, when they are more sedentary and give birth in winter and early spring (COSEWIC 2003). Between April and September, ...
... 2003). Most wolverines become sexually mature at two to three years of age (Species at Risk 2010). Wolverines’ exhibit delayed implantation which allows the females to breed in summer, when they are more sedentary and give birth in winter and early spring (COSEWIC 2003). Between April and September, ...
Life history traits contribute to decline of critically endangered lizards
... captured by hand using a noose. From November 1996 to May 1998 sampling sessions lasted 3 weeks. From November 1998 to May 2002 sampling sessions were extended to 5 weeks in an effort to improve number of captures. In total, populations were sampled 18 times over the 6-year study with the exception ...
... captured by hand using a noose. From November 1996 to May 1998 sampling sessions lasted 3 weeks. From November 1998 to May 2002 sampling sessions were extended to 5 weeks in an effort to improve number of captures. In total, populations were sampled 18 times over the 6-year study with the exception ...
Distribution of the Long-tailed Weasel (Mustela frenata) in Illinois
... Species distribution maps for rare or secretive species are likely to be very sensitive to sample size. Our search for long-tailed weasel specimens resulted in 181 records, which exceeds the 48 examined by Hoffmeister (1989) and the 12 additional records he found in the literature. From the museum s ...
... Species distribution maps for rare or secretive species are likely to be very sensitive to sample size. Our search for long-tailed weasel specimens resulted in 181 records, which exceeds the 48 examined by Hoffmeister (1989) and the 12 additional records he found in the literature. From the museum s ...
H. cydno - Proceedings of the Royal Society B
... wokinfo.com), nearly 300 articles addressing aspects of Heliconius biology have been published in the past five years. A major area of research has been ecological and genetic aspects of speciation, with some authors arguing that the genus exemplifies Darwin’s [6] notion that the species boundary is ...
... wokinfo.com), nearly 300 articles addressing aspects of Heliconius biology have been published in the past five years. A major area of research has been ecological and genetic aspects of speciation, with some authors arguing that the genus exemplifies Darwin’s [6] notion that the species boundary is ...
Habitat complexity: approaches and future directions
... Unlike the well-documented effects of habitat complexity on biodiversity, its relationships with other aspects of biological organization remain poorly studied. For example, even though effects of habitat complexity on predator–prey interactions attract almost as much attention as its effects on ric ...
... Unlike the well-documented effects of habitat complexity on biodiversity, its relationships with other aspects of biological organization remain poorly studied. For example, even though effects of habitat complexity on predator–prey interactions attract almost as much attention as its effects on ric ...
Resource partitioning for soil phosphorus: a hypothesis
... phosphate Species A would be expected to dominate, whereas in a low-phosphorus soil in which the turnover of organic phosphorus is of key importance for plant nutrition Species D would be most abundant. Phosphorus gradients occur naturally along soil chronosequences, in which the gradual loss of pho ...
... phosphate Species A would be expected to dominate, whereas in a low-phosphorus soil in which the turnover of organic phosphorus is of key importance for plant nutrition Species D would be most abundant. Phosphorus gradients occur naturally along soil chronosequences, in which the gradual loss of pho ...
Evaluation of Ecological Impacts from Highway
... Into Environmental Impact Analysis Under the National Environmental Policy Act, recommends an ecosystemapproachto biodiversity conservation. Therefore, the approachand methods describedin this report are consistentwith the increasedemphasisbeing placed on preserving biodiversity. As evidenced by the ...
... Into Environmental Impact Analysis Under the National Environmental Policy Act, recommends an ecosystemapproachto biodiversity conservation. Therefore, the approachand methods describedin this report are consistentwith the increasedemphasisbeing placed on preserving biodiversity. As evidenced by the ...
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.