Habitat coupling in lake ecosystems
... Fishes link benthic and pelagic habitats A common model of aquatic communities is a linear chain of interactions that progress from phytoplankton (primary producers), through zooplankton grazers to planktivorous fishes and then eventually to piscivorous fishes (e.g. Persson et al. 1992). This view o ...
... Fishes link benthic and pelagic habitats A common model of aquatic communities is a linear chain of interactions that progress from phytoplankton (primary producers), through zooplankton grazers to planktivorous fishes and then eventually to piscivorous fishes (e.g. Persson et al. 1992). This view o ...
Novel ecosystems in the Anthropocene
... an ecosystem has crossed a threshold, a measurable difference must exist between the ecosystem’s previous and current state. We propose that the occurrence of ecological parameters outside their historical ranges of variability (Walker and Meyers 2004, Keane et al. 2009) could be indicative of a thr ...
... an ecosystem has crossed a threshold, a measurable difference must exist between the ecosystem’s previous and current state. We propose that the occurrence of ecological parameters outside their historical ranges of variability (Walker and Meyers 2004, Keane et al. 2009) could be indicative of a thr ...
- University of Hawaii at Manoa
... into processes (e.g., biotic vs. abiotic determinants of community structure) that underscore the structural (e.g., biodiversity) and functional (e.g., nutrient cycling) attributes of ecosystems. This approach also can involve application of understanding achieved in one ecosystem to a wide range of ...
... into processes (e.g., biotic vs. abiotic determinants of community structure) that underscore the structural (e.g., biodiversity) and functional (e.g., nutrient cycling) attributes of ecosystems. This approach also can involve application of understanding achieved in one ecosystem to a wide range of ...
Section 1 How Organisms Interact in Communities
... nutrients, and water. Competition occurs for resources in short supply. In Africa, for example, lions and hyenas compete for prey. Fierce rivalry between these species can lead to battles that cause injuries to both sides. But most competitive interactions do not involve fighting. In fact, some comp ...
... nutrients, and water. Competition occurs for resources in short supply. In Africa, for example, lions and hyenas compete for prey. Fierce rivalry between these species can lead to battles that cause injuries to both sides. But most competitive interactions do not involve fighting. In fact, some comp ...
Speciation, and Conservation
... biota will be similar to the source, except as a result of accidents of sampling. As a consequence, the ecological niche space will already be largely filled at the point of isolation (Figure 1). This is true even if the island becomes, over geological time, more removed from the mainland: It will s ...
... biota will be similar to the source, except as a result of accidents of sampling. As a consequence, the ecological niche space will already be largely filled at the point of isolation (Figure 1). This is true even if the island becomes, over geological time, more removed from the mainland: It will s ...
S a fe gua rd in g th e R oman ia n C a rp a th ia ne co lo g ica lne tw
... networks in Romania instilled among many. The next step will be to implement the Carpathian ecological network delineated in this study, by establishing a robust system of effectively protected core areas interconnected by ecological linkages that will ensure the safe dispersal of animals between vi ...
... networks in Romania instilled among many. The next step will be to implement the Carpathian ecological network delineated in this study, by establishing a robust system of effectively protected core areas interconnected by ecological linkages that will ensure the safe dispersal of animals between vi ...
American Woodcock Habitat
... Opportunity Fund Grant from the National Fish and Wildlife Foundation and the Doris Duke Foundation, a Multi-state Conservation Grant from the U. S. Fish and Wildlife Service, and a Regional Conservation Needs grant from the Northeast Association of Fish and Wildlife Agencies. Other funding for this ...
... Opportunity Fund Grant from the National Fish and Wildlife Foundation and the Doris Duke Foundation, a Multi-state Conservation Grant from the U. S. Fish and Wildlife Service, and a Regional Conservation Needs grant from the Northeast Association of Fish and Wildlife Agencies. Other funding for this ...
Opposite relationships between invasibility and native species
... relationship between invasibility and native species richness may exist (Shea and Chesson 2002). Within a small area, however, gross resource levels are less variable, and the demand by resident species determines the resource availability (Shea and Chesson 2002). Therefore, at smaller scales, a neg ...
... relationship between invasibility and native species richness may exist (Shea and Chesson 2002). Within a small area, however, gross resource levels are less variable, and the demand by resident species determines the resource availability (Shea and Chesson 2002). Therefore, at smaller scales, a neg ...
View PDF - CiteSeerX
... of embryos and larvae of crested and marbled newts (Triturus cristatus and T. marmoratus) at 32 breeding sites in western France, based on 15 variables describing the aquatic habitat, and 10 variables describing the terrestrial habitat within a 100 m radius around the pond. The best model for embryo ...
... of embryos and larvae of crested and marbled newts (Triturus cristatus and T. marmoratus) at 32 breeding sites in western France, based on 15 variables describing the aquatic habitat, and 10 variables describing the terrestrial habitat within a 100 m radius around the pond. The best model for embryo ...
Propagule pressure: a null model for biological invasions
... We found 91 contrasts from 79 studies of characteristics associated with successful invaders. Analyses of invasiveness characteristics were primarily post hoc observational comparisons that contrasted established NIS with one of five different contrast groups in tests of invasion success: (i) species ...
... We found 91 contrasts from 79 studies of characteristics associated with successful invaders. Analyses of invasiveness characteristics were primarily post hoc observational comparisons that contrasted established NIS with one of five different contrast groups in tests of invasion success: (i) species ...
Declining amphibian populations and possible ecological
... malaria, yellow fever, etc. Hence, knowledge about factors affecting their abundance is important for human welfare. During the 990s a series of outdoor experiments were undertaken in the Negev Desert, Israel, to examine the interaction between mosquito larvae (Culiseta longiareolata Macquart, 838; ...
... malaria, yellow fever, etc. Hence, knowledge about factors affecting their abundance is important for human welfare. During the 990s a series of outdoor experiments were undertaken in the Negev Desert, Israel, to examine the interaction between mosquito larvae (Culiseta longiareolata Macquart, 838; ...
Ecology Practice Questions - Miami Beach Senior High School
... 50. Base your answer on the accompanying passage which describes an ecosystem in New York State and on your knowledge of biology. The Pine Bush ecosystem near Albany, New York, is one of the last known habitats of the nearly extinct Karner Blue butterfly. The butterfly's larvae feed on the wild gree ...
... 50. Base your answer on the accompanying passage which describes an ecosystem in New York State and on your knowledge of biology. The Pine Bush ecosystem near Albany, New York, is one of the last known habitats of the nearly extinct Karner Blue butterfly. The butterfly's larvae feed on the wild gree ...
wetlands wetlands
... across the land. Wetland buffers support both landand water-based animals, insects and plants. Potential amendments to the Critical Areas Ordinance seek to protect habitat and healthy functioning ecosystems in order to support viable fish and wildlife populations in Thurston County. Wetlands 1 ...
... across the land. Wetland buffers support both landand water-based animals, insects and plants. Potential amendments to the Critical Areas Ordinance seek to protect habitat and healthy functioning ecosystems in order to support viable fish and wildlife populations in Thurston County. Wetlands 1 ...
the Striped Legless Lizard brochure
... • Poorly timed burning of grasslands; regular burning, when soils are moist, and few cracks are available for animals to escape the fire, is risky. ...
... • Poorly timed burning of grasslands; regular burning, when soils are moist, and few cracks are available for animals to escape the fire, is risky. ...
Porifera_1-18
... factors are responsible for this difference? Dr. Wulff’s research suggests that biotic factors (predation and competition) are important : •Competition plays a more important role in determining sponge diversity in mangrove habitats. •Predation plays a more important role in determining sponge diver ...
... factors are responsible for this difference? Dr. Wulff’s research suggests that biotic factors (predation and competition) are important : •Competition plays a more important role in determining sponge diversity in mangrove habitats. •Predation plays a more important role in determining sponge diver ...
Scenarios of habitat management options to reduce predator
... Hirons 2002; Smart et al. 2008; O’Brien & Wilson 2011). However, lowland breeding waders have been declining dramatically (Wilson et al. 2005), and the impact of predation on the reproductive stage is a key factor limiting population recovery (MacDonald & Bolton 2008a; Schekkerman, Teunissen & Ooste ...
... Hirons 2002; Smart et al. 2008; O’Brien & Wilson 2011). However, lowland breeding waders have been declining dramatically (Wilson et al. 2005), and the impact of predation on the reproductive stage is a key factor limiting population recovery (MacDonald & Bolton 2008a; Schekkerman, Teunissen & Ooste ...
Lesson Overview - Enfield High School
... varying stages of secondary succession following multiple disturbances that took place at different times. Some climax communities are disturbed so often that they can’t really be called stable. ...
... varying stages of secondary succession following multiple disturbances that took place at different times. Some climax communities are disturbed so often that they can’t really be called stable. ...
The three grades of metazoan animals
... factors are responsible for this difference? Dr. Wulff’s research suggests that biotic factors (predation and competition) are important : •Competition plays a more important role in determining sponge diversity in mangrove habitats. •Predation plays a more important role in determining sponge diver ...
... factors are responsible for this difference? Dr. Wulff’s research suggests that biotic factors (predation and competition) are important : •Competition plays a more important role in determining sponge diversity in mangrove habitats. •Predation plays a more important role in determining sponge diver ...
Plant biodiversity in boreal wood-pastures: Impacts of grazing
... Wood-pastures are traditional rural biotopes that host high biodiversity due to the small-scale heterogeneity of grazer activities and the structural diversity of trees. However, wood-pastures and their biodiversity are threatened by intensification of agricultural and forestry practices as well as ...
... Wood-pastures are traditional rural biotopes that host high biodiversity due to the small-scale heterogeneity of grazer activities and the structural diversity of trees. However, wood-pastures and their biodiversity are threatened by intensification of agricultural and forestry practices as well as ...
Synthesis of Ecosystem Resources and Threats
... tomentella). Together, they cover over 23% of Catalina (Figure 1), and comprise ecosystems that encompass a large number of associated plant and animal species. It is thus alarming that oaks on Catalina appear to be declining, with the island‘s most prominent oak species, Quercus pacifica, exhibitin ...
... tomentella). Together, they cover over 23% of Catalina (Figure 1), and comprise ecosystems that encompass a large number of associated plant and animal species. It is thus alarming that oaks on Catalina appear to be declining, with the island‘s most prominent oak species, Quercus pacifica, exhibitin ...
Evaluating the role of the dingo as a trophic
... Harlow (unpub. 2005) have documented a similar pattern in Grand Teton National Park in Wyoming. The lower abundance and altered habitat use of coyotes in an area frequented by wolves was associated with higher rates of capture of small mammals, presumably because coyotes consume more small prey than ...
... Harlow (unpub. 2005) have documented a similar pattern in Grand Teton National Park in Wyoming. The lower abundance and altered habitat use of coyotes in an area frequented by wolves was associated with higher rates of capture of small mammals, presumably because coyotes consume more small prey than ...
SIZE RATIOS
... resource spectrum will no longer be favored by selection (Gotelli and Bossert 1991) or promoted by extinction of overlapping species (Turelli 1978b). More importantly, if the system has not reached an equilibrium, then species composition will change through time, and the derived morphological "patt ...
... resource spectrum will no longer be favored by selection (Gotelli and Bossert 1991) or promoted by extinction of overlapping species (Turelli 1978b). More importantly, if the system has not reached an equilibrium, then species composition will change through time, and the derived morphological "patt ...
COMPETITION AND SALT-MARSH PLANT ZONATION: STRESS
... on plant competition, few studies have explored how these processes interact with nonresource factors to determine community-level patterns. This study examined how resource competition interacts with physical stress to structure salt-marsh plant communities across a natural gradient in tidal stress ...
... on plant competition, few studies have explored how these processes interact with nonresource factors to determine community-level patterns. This study examined how resource competition interacts with physical stress to structure salt-marsh plant communities across a natural gradient in tidal stress ...
Field Methods in Landscape Analysis Geography 486
... study (at any scale be it global such as vegetation after a glacial retreat or at a smaller scale such as the dynamics of plants and animals after a chaparral or prairie fire). Increasingly ecologists and biogeographers recognize the importance of disturbance, and change in ecosystem dynamics. Scien ...
... study (at any scale be it global such as vegetation after a glacial retreat or at a smaller scale such as the dynamics of plants and animals after a chaparral or prairie fire). Increasingly ecologists and biogeographers recognize the importance of disturbance, and change in ecosystem dynamics. Scien ...
presentation source
... whose annual NDVI values more closely resemble those of prairie grasslands, while other fractions appear as denser forest stands similar to those represented by the first boreal endmember. Thus, based on the temporal characteristics of its annual July vegetation index we can deduce that the forest c ...
... whose annual NDVI values more closely resemble those of prairie grasslands, while other fractions appear as denser forest stands similar to those represented by the first boreal endmember. Thus, based on the temporal characteristics of its annual July vegetation index we can deduce that the forest c ...
Biological Dynamics of Forest Fragments Project
The Biological Dynamics of Forest Fragments Project, originally called the Minimum Critical Size of Ecosystems Project is a large-scale ecological experiment looking at the effects of habitat fragmentation on tropical rainforest; it is one of the most expensive biology experiments ever run. The experiment, which was established in 1979 is located near Manaus, in the Brazilian Amazon. The project is jointly managed by the Smithsonian Institution and INPA, the Brazilian Institute for Research in the Amazon.The project was initiated in 1979 by Thomas Lovejoy to investigate the SLOSS debate. Initially named the Minimum Critical Size of Ecosystems Project, the project created forest fragments of sizes 1 hectare (2 acres), 10 hectares (25 acres), and 100 hectares (247 acres). Data were collected prior to the creation of the fragments and studies of the effects of fragmentation now exceed 25 years.As of October 2010 562 publications and 143 graduate dissertations and theses had emerged from the project.