Durham Research Online
... humans. The differences between modern ‘preagricultural’ humans and baboons were stressed, with the hominin fossil and archaeological records used to identify the stage in human evolution when hominin behaviour started to become more human-like than like monkeys (or apes). Other research using field ...
... humans. The differences between modern ‘preagricultural’ humans and baboons were stressed, with the hominin fossil and archaeological records used to identify the stage in human evolution when hominin behaviour started to become more human-like than like monkeys (or apes). Other research using field ...
FAQs On The Monarch Butterfly Endangered Species Act Petition
... and soybeans, and this will result in additional milkweed loss. New crops have recently been approved that are geneticallyengineered for resistances to multiple herbicides, including glyphosate. They will lead to still more intensive herbicide use, and increased herbicide drift that kills the flower ...
... and soybeans, and this will result in additional milkweed loss. New crops have recently been approved that are geneticallyengineered for resistances to multiple herbicides, including glyphosate. They will lead to still more intensive herbicide use, and increased herbicide drift that kills the flower ...
When predators go missing – rise of the herbivores
... Top predators control populations of smaller mesopredators and herbivores, preventing them from monopolising or destroying resources needed by many species. Predator pressure stabilises ecosystems but can be prevented by human agency. In southeast Australia several native mammal herbivores and omniv ...
... Top predators control populations of smaller mesopredators and herbivores, preventing them from monopolising or destroying resources needed by many species. Predator pressure stabilises ecosystems but can be prevented by human agency. In southeast Australia several native mammal herbivores and omniv ...
Productivity and carbon transfer in pelagic food webs
... Some of the major problems we face today are human induced changes to the nitrogen (N), phosphorus (P) and carbon (C) cycles. Predicted increases in rainfall and temperature due to climate change, may also increase dissolved organic matter (DOM) inflows to freshwater ecosystems in the boreal zone. N ...
... Some of the major problems we face today are human induced changes to the nitrogen (N), phosphorus (P) and carbon (C) cycles. Predicted increases in rainfall and temperature due to climate change, may also increase dissolved organic matter (DOM) inflows to freshwater ecosystems in the boreal zone. N ...
Habitat heterogeneity, biogenic disturbance, and
... Stanford, California, USA) on a Finnigan mass spectrometer (Thermo Electron, San Jose, California, USA). Cores of surficial sediments were also taken at Invertebrate/Extravert Cliff to assess the grain size distribution, C:H:N composition, and stable isotopic composition (C, N) of the upper 1 cm of s ...
... Stanford, California, USA) on a Finnigan mass spectrometer (Thermo Electron, San Jose, California, USA). Cores of surficial sediments were also taken at Invertebrate/Extravert Cliff to assess the grain size distribution, C:H:N composition, and stable isotopic composition (C, N) of the upper 1 cm of s ...
Methods for Locating African Lion Kills using Global Positioning System
... 8 Tambling et al. while remaining at the cluster. 6) Drain: distance from the cluster to the nearest drainage line (classes 1-4, S.MacFadyen, KNP Scientific Services GIS department), which we calculated using ArcMap 9.0 and treated as a continuous variable, giving a measure of distance to available ...
... 8 Tambling et al. while remaining at the cluster. 6) Drain: distance from the cluster to the nearest drainage line (classes 1-4, S.MacFadyen, KNP Scientific Services GIS department), which we calculated using ArcMap 9.0 and treated as a continuous variable, giving a measure of distance to available ...
“superspecies”, represented in Italy by three
... other streams), are phylogenetically more similar to Mediterranean ones than to those deriving from restocking. The same may be said of the trout in small watercourses in the Emilian Appennines, like the Riarbero stream (upper basin of the Secchia), analysis of which was based on morphological chara ...
... other streams), are phylogenetically more similar to Mediterranean ones than to those deriving from restocking. The same may be said of the trout in small watercourses in the Emilian Appennines, like the Riarbero stream (upper basin of the Secchia), analysis of which was based on morphological chara ...
Feeding Relationships Among Species of Notropis (Pisces
... Notropis spilopterus, subgenus (Cyprinella), is Although the emerald shiner is found most often similarly compressed, but has a deeper body. The in midwater (Trautman 1957), Cross (1967) sugmouth is also oblique and terminal; the snout acute. gests a preference for sand bottoms. The species is Stand ...
... Notropis spilopterus, subgenus (Cyprinella), is Although the emerald shiner is found most often similarly compressed, but has a deeper body. The in midwater (Trautman 1957), Cross (1967) sugmouth is also oblique and terminal; the snout acute. gests a preference for sand bottoms. The species is Stand ...
Cats and Predation
... for one hundred years and haven’t done any noticeable damage yet” (Berkeley, 2001). One of the few studies that actually looks at the effects of cat predation on prey, cautions the use of extrapolated estimates. Author of the study, D. G. Barratt says: Predation estimates alone do not necessarily re ...
... for one hundred years and haven’t done any noticeable damage yet” (Berkeley, 2001). One of the few studies that actually looks at the effects of cat predation on prey, cautions the use of extrapolated estimates. Author of the study, D. G. Barratt says: Predation estimates alone do not necessarily re ...
Ecological Divergence and Reproductive Isolation in an Amazonian
... Neotropical forests have the highest tree diversity on earth, with an estimated 22,000 species. In contrast temperate North America, Europe and Asia combined support only 1,166 tree species. In the western Amazon rainforest, complex patterns of edaphic heterogeneity have been invoked as potential dr ...
... Neotropical forests have the highest tree diversity on earth, with an estimated 22,000 species. In contrast temperate North America, Europe and Asia combined support only 1,166 tree species. In the western Amazon rainforest, complex patterns of edaphic heterogeneity have been invoked as potential dr ...
Condition index monitoring supports conservation priorities for the
... and corticosterone concentrations during moult (seasonal pattern similar to Gouldian finches), haematocrit values did not differ among populations in a predictable way. Star and black-throated finch populations, which were predicted to be vulnerable to decline, showed evidence of poor condition duri ...
... and corticosterone concentrations during moult (seasonal pattern similar to Gouldian finches), haematocrit values did not differ among populations in a predictable way. Star and black-throated finch populations, which were predicted to be vulnerable to decline, showed evidence of poor condition duri ...
LEC19 Inference
... Percentage of Null Pixels that are False Positives Control of Familywise Error Rate at 10% Occurrence of Familywise Error ...
... Percentage of Null Pixels that are False Positives Control of Familywise Error Rate at 10% Occurrence of Familywise Error ...
A trophic cascade induced by predatory ants in a figfig wasp
... the weaver ant Oecophylla smaragdina, associated with the fig tree Ficus racemosa in southwest China. We then tested the effects of weaver ants on the oviposition behaviour of pollinating and non-pollinating fig wasps in an ant-exclusion experiment. The effects of weaver ants on fig wasp community s ...
... the weaver ant Oecophylla smaragdina, associated with the fig tree Ficus racemosa in southwest China. We then tested the effects of weaver ants on the oviposition behaviour of pollinating and non-pollinating fig wasps in an ant-exclusion experiment. The effects of weaver ants on fig wasp community s ...
Response of macroarthropod assemblages to the loss
... The Harvard Forest Hemlock Removal Experiment (HF-HeRE) includes two canopy-level manipulations that mimic structural changes caused either by the adelgid or by logging, each of which was applied to replicated 90 3 90 m (0.81 ha) forest plots with at least 70% (basal area) hemlock. The complete expe ...
... The Harvard Forest Hemlock Removal Experiment (HF-HeRE) includes two canopy-level manipulations that mimic structural changes caused either by the adelgid or by logging, each of which was applied to replicated 90 3 90 m (0.81 ha) forest plots with at least 70% (basal area) hemlock. The complete expe ...
- D-Scholarship@Pitt
... Figure 4.2. AMF hyphal colonization in roots exposed to fungicide and a water control……...140 Figure 4.3. Mycorrhizal dependency based on average height………………………………...141 Figure 4.4. Mycorrhizal dependency based on frequency of flowering……………………….142 ...
... Figure 4.2. AMF hyphal colonization in roots exposed to fungicide and a water control……...140 Figure 4.3. Mycorrhizal dependency based on average height………………………………...141 Figure 4.4. Mycorrhizal dependency based on frequency of flowering……………………….142 ...
111 - CREAF
... results. Despite generations of biochemists and physiologists reporting the plasticity of the elemental composition of marine phytoplankton in the field and in laboratory cultures (Hecky et al. 1993; Geider and La Roche 2002), values close to N:P Redfield ratios in marine phytoplankton (Ho et al. 20 ...
... results. Despite generations of biochemists and physiologists reporting the plasticity of the elemental composition of marine phytoplankton in the field and in laboratory cultures (Hecky et al. 1993; Geider and La Roche 2002), values close to N:P Redfield ratios in marine phytoplankton (Ho et al. 20 ...
Foraging movements and habitat niche of two closely
... Keywords: Scopoli’s shearwater; Cory’s shearwater; foraging strategies; stable ...
... Keywords: Scopoli’s shearwater; Cory’s shearwater; foraging strategies; stable ...
Below-ground resources limit seedling growth in forest understories
... 16, 17, 42], we predict that trenching will generally have a positive effect on whole-plant growth and survival and will increase the proportion of leaves and stems as a fraction of whole plant mass. The second hypothesis proposes that all species response will be influenced by light, such as all sp ...
... 16, 17, 42], we predict that trenching will generally have a positive effect on whole-plant growth and survival and will increase the proportion of leaves and stems as a fraction of whole plant mass. The second hypothesis proposes that all species response will be influenced by light, such as all sp ...
Olifant West and Balule Nature Reserve Warden Report
... We continue to provide data to the APNR elephant research initiative based in Timbavati. Close collaboration with the Dr’s Henley ensure that management decisions can be based on sound evidence rather than speculation. Our OWNR has become home to a small bachelor group of elephants that frequent the ...
... We continue to provide data to the APNR elephant research initiative based in Timbavati. Close collaboration with the Dr’s Henley ensure that management decisions can be based on sound evidence rather than speculation. Our OWNR has become home to a small bachelor group of elephants that frequent the ...
The Stabilizing Effect of Intraspecific Genetic Variation on Population
... selective environment in both laboratory and natural populations (for reviews, see Hoffmann and Merilä 1999; Charmantier and Garant 2005), and the impacts of reduced genetic variance due to inbreeding are also more severe in stressful habitats (Frankham et al. 2002; Armbruster and Reed 2005). Hence ...
... selective environment in both laboratory and natural populations (for reviews, see Hoffmann and Merilä 1999; Charmantier and Garant 2005), and the impacts of reduced genetic variance due to inbreeding are also more severe in stressful habitats (Frankham et al. 2002; Armbruster and Reed 2005). Hence ...
Complex interactions link the microbial
... Two experiments were conducted in Schohsee, a moderately eutrophic lake in northern Germany, during fall 1993. The experimental containers were 2-liter PVC bottles, incubated in situ at 2-m depth. In both experiments, the cyclopoids used in the experiments were obtained from the lake the day before ...
... Two experiments were conducted in Schohsee, a moderately eutrophic lake in northern Germany, during fall 1993. The experimental containers were 2-liter PVC bottles, incubated in situ at 2-m depth. In both experiments, the cyclopoids used in the experiments were obtained from the lake the day before ...
Life Cycle of the Peppered Moth
... The economic changes known as the industrial revolution began in the middle of the eighteenth century. Since then, tons of soot have been deposited on the country side around industrial areas. The soot discolored and generally darkened the surfaces of trees and rocks. In 1848, a dark-colored moth wa ...
... The economic changes known as the industrial revolution began in the middle of the eighteenth century. Since then, tons of soot have been deposited on the country side around industrial areas. The soot discolored and generally darkened the surfaces of trees and rocks. In 1848, a dark-colored moth wa ...
Peppered Moth Simulation questions
... Objective: Simulate changes in moth population due to pollution and predation, and observe how species can change over time. ...
... Objective: Simulate changes in moth population due to pollution and predation, and observe how species can change over time. ...
Life Cycle of the Peppered Moth
... The economic changes known as the industrial revolution began in the middle of the eighteenth century. Since then, tons of soot have been deposited on the country side around industrial areas. The soot discoloured and generally darkened the surfaces of trees and rocks. In 1848, a dark-coloured moth ...
... The economic changes known as the industrial revolution began in the middle of the eighteenth century. Since then, tons of soot have been deposited on the country side around industrial areas. The soot discoloured and generally darkened the surfaces of trees and rocks. In 1848, a dark-coloured moth ...
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.