Density and Gorgonian Host-occupation Patterns by Flamingo
... 1). Chi-square indicated that more snails (66 %) occurred in all spur and groove sites compared to hard-bottom (X2 = 7.38, df = 1, 0.01 > P > 0.005). Mean C. gibbosum density was 1.6 times greater in spur and groove than in hard-bottom, but the difference was not significant (t-test; P > 0.05). The ...
... 1). Chi-square indicated that more snails (66 %) occurred in all spur and groove sites compared to hard-bottom (X2 = 7.38, df = 1, 0.01 > P > 0.005). Mean C. gibbosum density was 1.6 times greater in spur and groove than in hard-bottom, but the difference was not significant (t-test; P > 0.05). The ...
Identifying Conservation and Research Priorities in the Face of
... the recovery of threatened species and that is first to identify the cause of decline. This is often reduced to the task of identifying the threatening process(es). Logically, once the threat has been identified, it is necessary to take actions to mitigate the threatening process. It is also critica ...
... the recovery of threatened species and that is first to identify the cause of decline. This is often reduced to the task of identifying the threatening process(es). Logically, once the threat has been identified, it is necessary to take actions to mitigate the threatening process. It is also critica ...
Piping Plover (Charadrius melodus melodus)
... the information required to calculate demographic parameters for the regional population. Population modelling of this data indicated interesting trends and predictions (Calvert 2004). Although the Gulf of St. Lawrence subpopulation includes a larger total number of birds, the model suggested that t ...
... the information required to calculate demographic parameters for the regional population. Population modelling of this data indicated interesting trends and predictions (Calvert 2004). Although the Gulf of St. Lawrence subpopulation includes a larger total number of birds, the model suggested that t ...
Mid-Atlantic/Southern New England BCR Plan
... estuarine emergent wetland , beach/sand/mud flat, estuaries and bays, marine open water, and rocky coastlines (including islands). Bird species have been grouped according to their use of these habitats. Many species utilize more than one habitat type and can be located in multiple tables. Conservat ...
... estuarine emergent wetland , beach/sand/mud flat, estuaries and bays, marine open water, and rocky coastlines (including islands). Bird species have been grouped according to their use of these habitats. Many species utilize more than one habitat type and can be located in multiple tables. Conservat ...
Ecology Portfolio
... 4. BIOTIC FACTORS There are several living factors that may affect the study site. Some biotic factors are natural, such as competition, parasitism and predation. Other factors are human in origin and may be detrimental to an ecosystem. These include presence of pollutants, burning, deforestation, i ...
... 4. BIOTIC FACTORS There are several living factors that may affect the study site. Some biotic factors are natural, such as competition, parasitism and predation. Other factors are human in origin and may be detrimental to an ecosystem. These include presence of pollutants, burning, deforestation, i ...
Perry J, Fisher A and Palmer C (2011)
... well-established search methods used at a grasswren site near Mount Isa. This site has been sampled consistently between 1998 and 2003 (B. F. Forsyth, unpubl. data). The following details Q2 shaped our final survey methodology: the average time for successful searches was 3.8 h; Carpentarian Grasswre ...
... well-established search methods used at a grasswren site near Mount Isa. This site has been sampled consistently between 1998 and 2003 (B. F. Forsyth, unpubl. data). The following details Q2 shaped our final survey methodology: the average time for successful searches was 3.8 h; Carpentarian Grasswre ...
Small mouthed Salamander (Ambystoma texanum)
... The federal, provincial, and territorial government signatories under the Accord for the Protection of Species at Risk (1996) 2 agreed to establish complementary legislation and programs that provide for effective protection of species at risk throughout Canada. Under the Species at Risk Act (S.C. 2 ...
... The federal, provincial, and territorial government signatories under the Accord for the Protection of Species at Risk (1996) 2 agreed to establish complementary legislation and programs that provide for effective protection of species at risk throughout Canada. Under the Species at Risk Act (S.C. 2 ...
Lesser Prairie-Chicken Conservation Initiative Lesser Prairie
... species whose presence signals a healthy ecosystem with broad, open horizons in which many grassland/shrubland species can survive. Conversely, its absence points to prairie habitats in decline. Not all is well with the lesser prairie-chicken. Within the 5 states of its historic range, the lesser pr ...
... species whose presence signals a healthy ecosystem with broad, open horizons in which many grassland/shrubland species can survive. Conversely, its absence points to prairie habitats in decline. Not all is well with the lesser prairie-chicken. Within the 5 states of its historic range, the lesser pr ...
Spatial and Temporal Dimensions of Biodiversity Dynamics
... by the life histories of the colonising species. Colonisers can be classified as the ecological types of selection r and K, according to the logistic rates of population growth. R-selected species maximise the intrinsic rate of population increase (r). Every time favourable conditions become effecti ...
... by the life histories of the colonising species. Colonisers can be classified as the ecological types of selection r and K, according to the logistic rates of population growth. R-selected species maximise the intrinsic rate of population increase (r). Every time favourable conditions become effecti ...
Disturbance regime and limits on benefits of - Everglades-HUB
... of mobile animals to disturbance is becoming increasingly important as climate projections forecast increases in disturbances such as drought (Bates et al. 2008). Disturbance can be defined as a temporally discrete removal of biomass, resulting in changes in the physical environment (Sousa 1984, Whit ...
... of mobile animals to disturbance is becoming increasingly important as climate projections forecast increases in disturbances such as drought (Bates et al. 2008). Disturbance can be defined as a temporally discrete removal of biomass, resulting in changes in the physical environment (Sousa 1984, Whit ...
Habitat use and movement patterns of the Northern
... Table 3. Number of habitat samples that occurred within each habitat type in 2005 and 2006. Available data were a random sample from the area available to rattlesnakes during the summer. The radius of this area was the maximum distance attained by a radio-tagged snake. Used data were systematically ...
... Table 3. Number of habitat samples that occurred within each habitat type in 2005 and 2006. Available data were a random sample from the area available to rattlesnakes during the summer. The radius of this area was the maximum distance attained by a radio-tagged snake. Used data were systematically ...
Population ecology of the Three-toed Woodpecker under
... short-term effects of fire vs. gap-dynamics on woodpecker abundance and its food supply. Finally (VII), I study whether the conservation value of forest patches for a ...
... short-term effects of fire vs. gap-dynamics on woodpecker abundance and its food supply. Finally (VII), I study whether the conservation value of forest patches for a ...
S1 Table
... (decidous, conifer and mixed), water, road (incl areas <15m from human made trail or road), farmland; forest = ref. category Basic patterns of home range size (6 – 35 km2), basic patterns of habitat use of burned habitats. However, insufficient information is presented to be able to estimate selecti ...
... (decidous, conifer and mixed), water, road (incl areas <15m from human made trail or road), farmland; forest = ref. category Basic patterns of home range size (6 – 35 km2), basic patterns of habitat use of burned habitats. However, insufficient information is presented to be able to estimate selecti ...
The ecology of shell shape difference in chirally - UvA-DARE
... to show subtle differences between both coiling morphs, and it is known that in snails in general, shell shape is under environmental selection, thus creating the possibility that micro-niche use of both coiling morphs differs. In this paper, we first confirm that hatchlings also differ in shell sha ...
... to show subtle differences between both coiling morphs, and it is known that in snails in general, shell shape is under environmental selection, thus creating the possibility that micro-niche use of both coiling morphs differs. In this paper, we first confirm that hatchlings also differ in shell sha ...
Recovery Strategy for the Butler`s Gartersnake (Thamnophis butleri
... The federal, provincial, and territorial government signatories under the Accord for the Protection of Species at Risk (1996) 2 agreed to establish complementary legislation and programs that provide for effective protection of species at risk throughout Canada. Under the Species at Risk Act (S.C. 2 ...
... The federal, provincial, and territorial government signatories under the Accord for the Protection of Species at Risk (1996) 2 agreed to establish complementary legislation and programs that provide for effective protection of species at risk throughout Canada. Under the Species at Risk Act (S.C. 2 ...
Allee effects, extinctions, and chaotic transients in simple population
... (Wolda & Dennis 1993; Turchin 1995; Harrison & Cappuccino 1995). At lower population densities, any of these factors can dominate. The Allee effect occurs when positive density dependence dominates at low densities. When the Allee effect is sufficiently strong, there is a critical threshold below wh ...
... (Wolda & Dennis 1993; Turchin 1995; Harrison & Cappuccino 1995). At lower population densities, any of these factors can dominate. The Allee effect occurs when positive density dependence dominates at low densities. When the Allee effect is sufficiently strong, there is a critical threshold below wh ...
Predicting changes in the distribution and abundance of species
... annual vital rates given the changing drivers and intraspecific density, use the vital rates to update population sizes at each location, add stochastic dispersal and repeat until we reach the desired future time horizon, and then use the predicted abundance to identify the distribution (Fig. 1, arr ...
... annual vital rates given the changing drivers and intraspecific density, use the vital rates to update population sizes at each location, add stochastic dispersal and repeat until we reach the desired future time horizon, and then use the predicted abundance to identify the distribution (Fig. 1, arr ...
Using Livestock to Manage Wildlife Habitat
... that diet overlap (two animal species eating the same plant species) between whitetailed deer and cattle ranged from 2 to 64 percent. This overlap increased with drought and a heavy cattle stocking rate for that area (6 acres/animal unit/year). In this study, cattle grazing increased plant diversity ...
... that diet overlap (two animal species eating the same plant species) between whitetailed deer and cattle ranged from 2 to 64 percent. This overlap increased with drought and a heavy cattle stocking rate for that area (6 acres/animal unit/year). In this study, cattle grazing increased plant diversity ...
How fast do migratory songbirds have to adapt to keep pace with
... on biodiversity, we are still left with the fundamental question of whether species will be able to respond quickly enough to keep pace with current or projected rates of environmental change. Species have several options for responding to environmental change, which has been succinctly summarized a ...
... on biodiversity, we are still left with the fundamental question of whether species will be able to respond quickly enough to keep pace with current or projected rates of environmental change. Species have several options for responding to environmental change, which has been succinctly summarized a ...
b 2 - Videolectures
... Can scale-free patterns form as a self-organization process, or are they merely a result of exogenous factors such as microtopography, rocky soil, etc. ? Can we resolve this dichotomy of vegetation patterns: Regular vs. scale-free patterns ? (Manor & Shnerb JTB 2008) ...
... Can scale-free patterns form as a self-organization process, or are they merely a result of exogenous factors such as microtopography, rocky soil, etc. ? Can we resolve this dichotomy of vegetation patterns: Regular vs. scale-free patterns ? (Manor & Shnerb JTB 2008) ...
The Green and Golden Bell Frog Parramatta Key Population
... This Management Plan covers three key populations located within the Sydney Green and Golden Bell Frog (GGBF) Management Region as defined in the Recovery Plan. These key populations are: 1. Homebush Bay key population - taking in the Sydney Olympic Parklands area 2. Clyde/Rosehill key population - ...
... This Management Plan covers three key populations located within the Sydney Green and Golden Bell Frog (GGBF) Management Region as defined in the Recovery Plan. These key populations are: 1. Homebush Bay key population - taking in the Sydney Olympic Parklands area 2. Clyde/Rosehill key population - ...
The Landscape Ecology of Invasive Spread
... governs invasion speed, even when long-distance dispersal is rare ( Kot et al. 1996; Lewis 1997; Neubert & Caswell 2000). Although the shape of the dispersal distribution has been assumed to be more important than demographic parameters in influencing invasions (van den Bosch et al. 1992), models th ...
... governs invasion speed, even when long-distance dispersal is rare ( Kot et al. 1996; Lewis 1997; Neubert & Caswell 2000). Although the shape of the dispersal distribution has been assumed to be more important than demographic parameters in influencing invasions (van den Bosch et al. 1992), models th ...
Waterfowl Habitat Conservation Strategy December 2007
... Venture (JV) region and to smaller scales within the region. We estimated what, where, when, and how much habitat is needed to sustain or increase populations of waterfowl species to target levels. Regional objectives also are “rolled up” in a manner that addresses the JV’s contribution to continent ...
... Venture (JV) region and to smaller scales within the region. We estimated what, where, when, and how much habitat is needed to sustain or increase populations of waterfowl species to target levels. Regional objectives also are “rolled up” in a manner that addresses the JV’s contribution to continent ...
Waterfowl Habitat Conservation Strategy
... Venture (JV) region and to smaller scales within the region. We estimated what, where, when, and how much habitat is needed to sustain or increase populations of waterfowl species to target levels. Regional objectives also are “rolled up” in a manner that addresses the JV’s contribution to continent ...
... Venture (JV) region and to smaller scales within the region. We estimated what, where, when, and how much habitat is needed to sustain or increase populations of waterfowl species to target levels. Regional objectives also are “rolled up” in a manner that addresses the JV’s contribution to continent ...