Loggerhead Shrike Prairie subspecies
... medium-sized songbird that is often seen perched on tall shrubs, telephone poles and fence posts around farmyards, shelterbelts and pastures with shrubs in prairie Canada. It impales its prey on thorns or barbed wire to tear the flesh apart with its hooked beak, and is often called the butcher bird. ...
... medium-sized songbird that is often seen perched on tall shrubs, telephone poles and fence posts around farmyards, shelterbelts and pastures with shrubs in prairie Canada. It impales its prey on thorns or barbed wire to tear the flesh apart with its hooked beak, and is often called the butcher bird. ...
Duck Nesting Success: What Is It, and What Are The Important
... No, it is not. Since 2000, DU has conducted long-term research across nearly 40 study sites in the Missouri Coteau region of North and South Dakota. Sites have had greater than 15% nesting success nearly 1/3 of the time with several areas with large blocks of intact native grassland yielding greater ...
... No, it is not. Since 2000, DU has conducted long-term research across nearly 40 study sites in the Missouri Coteau region of North and South Dakota. Sites have had greater than 15% nesting success nearly 1/3 of the time with several areas with large blocks of intact native grassland yielding greater ...
Western Burrowing Owl
... and owls will fly through urban areas to forage in nearby areas. However, the type and minimum extent of development that constitutes a movement barrier between occupied patches and nearby foraging areas are not known. It is assumed that corridors between small habitats and other suitable areas woul ...
... and owls will fly through urban areas to forage in nearby areas. However, the type and minimum extent of development that constitutes a movement barrier between occupied patches and nearby foraging areas are not known. It is assumed that corridors between small habitats and other suitable areas woul ...
Ecology Test Review
... Abiotic factors (i.e. climate) – Most important factor in determining a biome. Biomes of the same type have similar plant and animal species ...
... Abiotic factors (i.e. climate) – Most important factor in determining a biome. Biomes of the same type have similar plant and animal species ...
THE HABITAT CONCEPT IN ORNITHOLOGY
... Southwood (1977) theorized that characteristics of a habitat acted as a "templet" that influenced ecological strategies used by animals to survive and reproduce. Building on concepts developed by Burges (1960), Birch (1971), and Taylor and Taylor (1977), Southwood used a simple, twodimensional "repr ...
... Southwood (1977) theorized that characteristics of a habitat acted as a "templet" that influenced ecological strategies used by animals to survive and reproduce. Building on concepts developed by Burges (1960), Birch (1971), and Taylor and Taylor (1977), Southwood used a simple, twodimensional "repr ...
Alternative causes of edge-abundance relationships in birds and
... of animals relative to edge, even if the animals consistently respond to the changes in habitat when they occur (i.e. a ‘‘matrix effect’’). Conversely, similar patterns of change in abundance among species at a particular edge can be caused by different mechanisms, in that an ‘‘ecotonal effect’’ in ...
... of animals relative to edge, even if the animals consistently respond to the changes in habitat when they occur (i.e. a ‘‘matrix effect’’). Conversely, similar patterns of change in abundance among species at a particular edge can be caused by different mechanisms, in that an ‘‘ecotonal effect’’ in ...
adaptive radiation driven by the interplay of eco
... been studied in the simplified case of up to two sites and species (Aguilée et al. 2011b), but not yet in complex landscapes, potentially allowing for the emergence of multiple, interacting species. In the present study, we investigate whether landscape dynamics may cause a radiation, and if so, by ...
... been studied in the simplified case of up to two sites and species (Aguilée et al. 2011b), but not yet in complex landscapes, potentially allowing for the emergence of multiple, interacting species. In the present study, we investigate whether landscape dynamics may cause a radiation, and if so, by ...
Heterogeneity
... • This variation makes studies complicated – some processes depend on patchiness, but not all. • General, organismal responses are a good measure by which to assess relevant scale. (neighbourhood scale) • Neighbourhood for vagile species is obviously their territory or resource area • For sessile sp ...
... • This variation makes studies complicated – some processes depend on patchiness, but not all. • General, organismal responses are a good measure by which to assess relevant scale. (neighbourhood scale) • Neighbourhood for vagile species is obviously their territory or resource area • For sessile sp ...
Environmental variability and population dynamics: do European
... prairies) and in stable (north European lakes) environments, to distinguish the relative contributions of environmental variability (measured as between-year fluctuations in wetland numbers) and intraspecific interactions (density dependence) in driving population dynamics. We tested whether popula ...
... prairies) and in stable (north European lakes) environments, to distinguish the relative contributions of environmental variability (measured as between-year fluctuations in wetland numbers) and intraspecific interactions (density dependence) in driving population dynamics. We tested whether popula ...
habitat in agricultural landscapes: how much is enough?
... landscape-scale biodiversity implications of different patterns of production systems, land use, and management in agricultural landscapes. Effective conservation will require integration of local knowledge, science, and deliberative democratic participation in land and natural resource management d ...
... landscape-scale biodiversity implications of different patterns of production systems, land use, and management in agricultural landscapes. Effective conservation will require integration of local knowledge, science, and deliberative democratic participation in land and natural resource management d ...
The potential role of ecological corridors for habitat conservation in
... forests) than for priority Irish habitats. Regional corridors (linking sites separated by many kilometres) are distinguished from local corridors (linking habitat patches within sites). Local corridors of suitably wide habitat are likely to benefit invertebrates, and vertebrates such as bats, but th ...
... forests) than for priority Irish habitats. Regional corridors (linking sites separated by many kilometres) are distinguished from local corridors (linking habitat patches within sites). Local corridors of suitably wide habitat are likely to benefit invertebrates, and vertebrates such as bats, but th ...
Guide to - Duke Farms
... Native grasses grow in Northeastern meadows as well as Western prairies. Their deep roots stabilize soil, preventing erosion and reaching water even during periods of summer drought. They provide seed, cover and nesting area for birds, and food for mammals. Many grasses are “warm season” grasses, wh ...
... Native grasses grow in Northeastern meadows as well as Western prairies. Their deep roots stabilize soil, preventing erosion and reaching water even during periods of summer drought. They provide seed, cover and nesting area for birds, and food for mammals. Many grasses are “warm season” grasses, wh ...
Chapter 2: - Darlak4Science
... b) The human population is currently growing at an exponential rate. Since you have learned that populations cannot grow forever, what are some things (more than one!) that could happen when the human population reaches its carrying capacity? ...
... b) The human population is currently growing at an exponential rate. Since you have learned that populations cannot grow forever, what are some things (more than one!) that could happen when the human population reaches its carrying capacity? ...
Has the Luangwa (Zambia) hippopotamus (Hippopotamus
... Secondly, since food production varies from year to year depending on amount of rainfall, herbivores follow a similar pattern [4]. When the animal numbers are low there would be excess resources, so the population increases unless predators hold them down [5]. The assumption was based on a simple an ...
... Secondly, since food production varies from year to year depending on amount of rainfall, herbivores follow a similar pattern [4]. When the animal numbers are low there would be excess resources, so the population increases unless predators hold them down [5]. The assumption was based on a simple an ...
Hydrological and habitat requirements to maintain viable Southern
... hydroperiod can result in mass mortality of tadpoles and poor survivorship amongst resulting metamorphs (Lane and Mahony, 2002). Flooding frequency also plays a key role in structuring amphibian communities because reduced flooding frequency can exclude species that do not have adaptations which all ...
... hydroperiod can result in mass mortality of tadpoles and poor survivorship amongst resulting metamorphs (Lane and Mahony, 2002). Flooding frequency also plays a key role in structuring amphibian communities because reduced flooding frequency can exclude species that do not have adaptations which all ...
Management and conservation of the kelp species Laminaria
... information (e.g. source/sink dynamics) for sitting marine reserves (Crowder et al. 2000; Cowen and Sponaugle 2009). Marine populations display a high spatio-temporal heterogeneity regarding genetic and demographic factors such as dispersal distances and settlement rates. The “open”, nostructured po ...
... information (e.g. source/sink dynamics) for sitting marine reserves (Crowder et al. 2000; Cowen and Sponaugle 2009). Marine populations display a high spatio-temporal heterogeneity regarding genetic and demographic factors such as dispersal distances and settlement rates. The “open”, nostructured po ...
Disturbance, Habitat Structure, and the Dynamics of a Coral
... (Huston 1979, Strong 1983). Disturbance may also alter density-dependent factors such as per capita death or birth rates (e.g., by promoting selective mortality, Connell 1978) and thus might be expected to generate density-dependent effects on other species in the system. Spatial heterogeneity may a ...
... (Huston 1979, Strong 1983). Disturbance may also alter density-dependent factors such as per capita death or birth rates (e.g., by promoting selective mortality, Connell 1978) and thus might be expected to generate density-dependent effects on other species in the system. Spatial heterogeneity may a ...
Western ringtail possum - WWF
... Plant native species in your gardens to provide habitat and food for native species, particularly peppermint trees in western ringtail possum areas. Join your local community group and get involved in threatened species recovery. Protect remnant bushland that supports threatened species including we ...
... Plant native species in your gardens to provide habitat and food for native species, particularly peppermint trees in western ringtail possum areas. Join your local community group and get involved in threatened species recovery. Protect remnant bushland that supports threatened species including we ...
chapter 52 population ecology
... developed quantitative demography as a branch of biology. The best way to construct a life table is to follow the fate of a cohort, a group of individuals of the same age, from birth until all are dead. The table is constructed from the number of individuals that die in each age-group during the def ...
... developed quantitative demography as a branch of biology. The best way to construct a life table is to follow the fate of a cohort, a group of individuals of the same age, from birth until all are dead. The table is constructed from the number of individuals that die in each age-group during the def ...
Ecology
... Atoms – come together to make: Molecules – come together to make: Organelles – come together to make: Cells - come together to make: Tissues - come together to make: Organs - come together to make: Organ systems – come together to make: Organism - come together to make: Populations - come together t ...
... Atoms – come together to make: Molecules – come together to make: Organelles – come together to make: Cells - come together to make: Tissues - come together to make: Organs - come together to make: Organ systems – come together to make: Organism - come together to make: Populations - come together t ...
Reliable flows and preferred patterns in food webs
... We examined the reliability of matter and energy flows in ecosystems. We analysed sink web graphs and determined the probability that, in the sink web graph, the sink (the point representing the sink species) and one or more sources (points representing source species or producers) are connected to ...
... We examined the reliability of matter and energy flows in ecosystems. We analysed sink web graphs and determined the probability that, in the sink web graph, the sink (the point representing the sink species) and one or more sources (points representing source species or producers) are connected to ...
Marsh Bird Breeding Habitat
... Turtle - Open Water areas such as deeper rivers or streams and lakes with current can also be used as over-wintering habitat. ...
... Turtle - Open Water areas such as deeper rivers or streams and lakes with current can also be used as over-wintering habitat. ...
Engage - NC Science Wiki
... These interactions may support a stable population, but often result in wide fluctuation of population numbers over time in natural environments. Many environmental factors such as varying amounts of heat, light, water, minerals, shelter, and food influence the growth and survival of individuals wit ...
... These interactions may support a stable population, but often result in wide fluctuation of population numbers over time in natural environments. Many environmental factors such as varying amounts of heat, light, water, minerals, shelter, and food influence the growth and survival of individuals wit ...
NORTHERN HARRIER Circus cyaneus
... harriers in western Colorado is unknown due to of the lack of reliable estimates of their abundance. Standardized survey methods are needed to determine population trends on a regional level. Regional variations in nesting habitat and prey availability as factors limiting nesting densities have not ...
... harriers in western Colorado is unknown due to of the lack of reliable estimates of their abundance. Standardized survey methods are needed to determine population trends on a regional level. Regional variations in nesting habitat and prey availability as factors limiting nesting densities have not ...
Non Game Bird Management Plan for Neithercut Woodland By Brad
... woodland. If a breeding pair is found, find the nest and begin monitoring the success rate. -Plant 10% of the Sugar Maples in the clearings. -If Red Shouldered Hawks are not present, immediately start a reintroduction program. -Document important habitat areas based on vegetation composition -Begin ...
... woodland. If a breeding pair is found, find the nest and begin monitoring the success rate. -Plant 10% of the Sugar Maples in the clearings. -If Red Shouldered Hawks are not present, immediately start a reintroduction program. -Document important habitat areas based on vegetation composition -Begin ...