Alaska WatchList
... remoteness provided protection for some Trumpeter Swans. In 1954, a biologist identified breeding pairs in Alaska’s Copper River Basin as Trumpeter Swans, not Tundra Swans as previously assumed. Subsequent surveys revealed more breeding trumpeters. Following strict protection from hunting and distur ...
... remoteness provided protection for some Trumpeter Swans. In 1954, a biologist identified breeding pairs in Alaska’s Copper River Basin as Trumpeter Swans, not Tundra Swans as previously assumed. Subsequent surveys revealed more breeding trumpeters. Following strict protection from hunting and distur ...
2000 CRC Press LLC - Site de utilizadores
... Instead, they assembled species from various areas that they felt would grow well on the site. The primary goal was for the forest to last forever with little or no maintenance. While modeling a restoration project after a natural community is typically how restoration projects are planned, value (e ...
... Instead, they assembled species from various areas that they felt would grow well on the site. The primary goal was for the forest to last forever with little or no maintenance. While modeling a restoration project after a natural community is typically how restoration projects are planned, value (e ...
Interactions among Foundation Species and Their Consequences
... Articles which foundation species influence the distribution of associated organisms (e.g., shading by nurse plants, Turner et al. 1966; substrate stabilization by cordgrass, Altieri et al. 2007; and nursery effects of mangroves, Laegdsgaard and Johnson 2001). These studies have prompted the revisi ...
... Articles which foundation species influence the distribution of associated organisms (e.g., shading by nurse plants, Turner et al. 1966; substrate stabilization by cordgrass, Altieri et al. 2007; and nursery effects of mangroves, Laegdsgaard and Johnson 2001). These studies have prompted the revisi ...
Effects of altered resource consumption rates by one consumer
... Adding a handling time (Fig. 2B) again greatly complicates the dynamics. Here, the system is initially stable, and increases in both of species 1Õs C values by a factor z increase its population and decrease the competitor’s population. However, the system becomes unstable at a proportional increase ...
... Adding a handling time (Fig. 2B) again greatly complicates the dynamics. Here, the system is initially stable, and increases in both of species 1Õs C values by a factor z increase its population and decrease the competitor’s population. However, the system becomes unstable at a proportional increase ...
Marcel Rejmánek at 60 – the man and his work
... Rejmánek’s contributions towards the development of a robust framework for plant invasion ecology have been more profound than his bibliography (impressive as it is) may suggest (Appendix 1). The “publish or perish” mentality in modern science is totally at odds with Marcel’s approach to research. S ...
... Rejmánek’s contributions towards the development of a robust framework for plant invasion ecology have been more profound than his bibliography (impressive as it is) may suggest (Appendix 1). The “publish or perish” mentality in modern science is totally at odds with Marcel’s approach to research. S ...
Chapter 47
... 2. Each female of a particular fish species produces millions of eggs per year. Draw and label the most likely survivorship curve for this species and explain your choice. 3. Where is population growth more likely – in an area where a forest was destroyed by fire or in a mature undisturbed forest? W ...
... 2. Each female of a particular fish species produces millions of eggs per year. Draw and label the most likely survivorship curve for this species and explain your choice. 3. Where is population growth more likely – in an area where a forest was destroyed by fire or in a mature undisturbed forest? W ...
Sample Chapter 03
... South Atlantic Ocean. Tristan is one of the world’s most isolated island systems, lying midway between South America and the tip of South Africa. Of the three islands, two of them, Inaccessible and Nightingale, had been relatively untouched by humans and their associated pests, mice and rats. Both t ...
... South Atlantic Ocean. Tristan is one of the world’s most isolated island systems, lying midway between South America and the tip of South Africa. Of the three islands, two of them, Inaccessible and Nightingale, had been relatively untouched by humans and their associated pests, mice and rats. Both t ...
Parasite host-switching from the invasive American red
... USA all over the world. Once introduced into its new environment, feral populations may arise and pose threats to local biodiversity and ecosystem functioning. In France, it is in fact considered as a risk for the Mediterranean pond turtle, Mauremys leprosa, and the European pond turtle, Emys orbicu ...
... USA all over the world. Once introduced into its new environment, feral populations may arise and pose threats to local biodiversity and ecosystem functioning. In France, it is in fact considered as a risk for the Mediterranean pond turtle, Mauremys leprosa, and the European pond turtle, Emys orbicu ...
Competition - Cal State LA
... • A concept that encompasses all of the individual environmental requirements of a species • This is definitely an abstract concept, but it helps us to organize and explain ecological phenomena ...
... • A concept that encompasses all of the individual environmental requirements of a species • This is definitely an abstract concept, but it helps us to organize and explain ecological phenomena ...
turkey, quail, and predators in the rolling plains, texas
... understand the basis on which decisions are made and to determine what information we still need to know. specific age and sex classes of turkey that are most susceptible? Is this 50% loss during a particular season or the result of particular environmental conditions that could be remedied? Are tur ...
... understand the basis on which decisions are made and to determine what information we still need to know. specific age and sex classes of turkey that are most susceptible? Is this 50% loss during a particular season or the result of particular environmental conditions that could be remedied? Are tur ...
Ecological Genetics and the Restoration of Plant Communities
... strategy uses mixtures of populations or hybrid genotypes (Millar & Libby 1989; Munda & Smith 1995). We cannot recommend a single correct strategy for any specific situation. Rather, we present a conceptual framework for assessing the value of different strategies across a wide array of situations. ...
... strategy uses mixtures of populations or hybrid genotypes (Millar & Libby 1989; Munda & Smith 1995). We cannot recommend a single correct strategy for any specific situation. Rather, we present a conceptual framework for assessing the value of different strategies across a wide array of situations. ...
EVOLUTION OF DIVARICATING PLANTS IN NEW ZEALAND IN
... It was however a reading of Went's (1971) statement: "One might e.g. have assumed that the extreme degree of branching, combined with microphylly, would be an adaptation against browsing animals, but New Zealand is the only extensive geographical area without larger native herbivores. ." that lead o ...
... It was however a reading of Went's (1971) statement: "One might e.g. have assumed that the extreme degree of branching, combined with microphylly, would be an adaptation against browsing animals, but New Zealand is the only extensive geographical area without larger native herbivores. ." that lead o ...
Native Plants - Private Landowner Network
... to be of conservation concern. More than 850 of them are on the federal list of threatened and endangered species, which is maintained by the U.S. Fish and Wildlife Service. A species is considered endangered when it is at risk of becoming extinct in the near future (if not adequately protected). A ...
... to be of conservation concern. More than 850 of them are on the federal list of threatened and endangered species, which is maintained by the U.S. Fish and Wildlife Service. A species is considered endangered when it is at risk of becoming extinct in the near future (if not adequately protected). A ...
Influences of Trees on Abundance of Natural Enemies of Insect
... that feed on crop pests were more abundant at the edge of multi-row windbreaks than in the interior of the windbreak [Katayama, 1980]. In single-row elm windbreaks, most of the windbreak is edge; thus, carabid and staphylinid abundance should be relatively constant across the windbreak [Frye et aI., ...
... that feed on crop pests were more abundant at the edge of multi-row windbreaks than in the interior of the windbreak [Katayama, 1980]. In single-row elm windbreaks, most of the windbreak is edge; thus, carabid and staphylinid abundance should be relatively constant across the windbreak [Frye et aI., ...
Differences in leaf δ13C among four dominant species in a
... first stage), suggesting that species with higher WUE would have substantial competitive advantages in vegetation succession. In this study, the four succession stages were identified basically with subjective approaches due mainly to the availability of plots with different history of abandonment, ...
... first stage), suggesting that species with higher WUE would have substantial competitive advantages in vegetation succession. In this study, the four succession stages were identified basically with subjective approaches due mainly to the availability of plots with different history of abandonment, ...
Do Tides Affect Coastal Insect Communities?
... not serve as a refuge during inundation. These findings prompt rejection of the hypothesis that adult insects are unable to withstand inundation and reinforce previous conclusions (Cameron, 1972) that saltmarsh insect populations are predominately controlled by biological, especially productional, f ...
... not serve as a refuge during inundation. These findings prompt rejection of the hypothesis that adult insects are unable to withstand inundation and reinforce previous conclusions (Cameron, 1972) that saltmarsh insect populations are predominately controlled by biological, especially productional, f ...
Perspectives on the Derivation of Aquatic Life Criteria for Pesticides
... • The 3-year return frequency in the 1985 guidelines was based on observed recovery times of fish populations. • Most aquatic invertebrate species have much shorter recovery times. Populations of crustaceans and many insect species recover from effects of pesticides within days or weeks, as observ ...
... • The 3-year return frequency in the 1985 guidelines was based on observed recovery times of fish populations. • Most aquatic invertebrate species have much shorter recovery times. Populations of crustaceans and many insect species recover from effects of pesticides within days or weeks, as observ ...
Ch.14-Lesson-2-WSs-f..
... 1. Possible answer: Plant populations might compete for space and light. Other populations eat the plants. 2. Possible answer: Insects might eat the plants or other populations of insects. They are eaten by fish, ducks, turtles, and other populations. 3. Possible answer: Different populations of fis ...
... 1. Possible answer: Plant populations might compete for space and light. Other populations eat the plants. 2. Possible answer: Insects might eat the plants or other populations of insects. They are eaten by fish, ducks, turtles, and other populations. 3. Possible answer: Different populations of fis ...
Modeling biodiversity response to habitat
... The variability among living organisms from all sources including, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part -International Convention on Biodiversity (1992) ...
... The variability among living organisms from all sources including, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part -International Convention on Biodiversity (1992) ...
Document
... The MS GAP dataset used for this analysis was a thematically classified statewide geospatial data layer based on 40 distinct LULC types. Both the raster image and the vector point file then were projected into a Transverse Mercator projection with the North American Datum 1983 (NAD83; the legal hori ...
... The MS GAP dataset used for this analysis was a thematically classified statewide geospatial data layer based on 40 distinct LULC types. Both the raster image and the vector point file then were projected into a Transverse Mercator projection with the North American Datum 1983 (NAD83; the legal hori ...
paper - Jordi Bascompte
... be organized in compartments (Fig. 2; Supplementary Table 4). In turn, consistent with theory21, our results show that food-web compartmentalization is associated with an increase in persistence (Supplementary Table 1). Therefore, the negative association between human density and food-web persisten ...
... be organized in compartments (Fig. 2; Supplementary Table 4). In turn, consistent with theory21, our results show that food-web compartmentalization is associated with an increase in persistence (Supplementary Table 1). Therefore, the negative association between human density and food-web persisten ...
Modeling the potential area of occupancy at fine resolution may
... methods, using the 80% of occurrences for calibration and different sub-sets (20%) for validation. Mean AUC was used to compare the performance of the five models. We compared the sensitivity of the two modeling situations for measuring the AOO under different thresholds of habitat suitability (HS), ...
... methods, using the 80% of occurrences for calibration and different sub-sets (20%) for validation. Mean AUC was used to compare the performance of the five models. We compared the sensitivity of the two modeling situations for measuring the AOO under different thresholds of habitat suitability (HS), ...
Frog Declines
... are believed to be involved, including habitat destruction and modification, overexploitation, pollution, introduced species, climate change, increased ultraviolet-B radiation (UVB) and disease. However, many of the causes of amphibian declines are still poorly understood, and amphibian declines are ...
... are believed to be involved, including habitat destruction and modification, overexploitation, pollution, introduced species, climate change, increased ultraviolet-B radiation (UVB) and disease. However, many of the causes of amphibian declines are still poorly understood, and amphibian declines are ...
i Community patterns of coral-associated decapods Nicholas Gotelli and Lawrence
... interspecific association. In this analysis, we compare species-area relationships for different locations (flat vs. flank following the terminology of Glynn, 1976) and seasons on the same reef. The effect of species' abundances on the species-area relationship is also assessed. This important facto ...
... interspecific association. In this analysis, we compare species-area relationships for different locations (flat vs. flank following the terminology of Glynn, 1976) and seasons on the same reef. The effect of species' abundances on the species-area relationship is also assessed. This important facto ...
Island restoration
The ecological restoration of islands, or island restoration, is the application of the principles of ecological restoration to islands and island groups. Islands, due to their isolation, are home to many of the world's endemic species, as well as important breeding grounds for seabirds and some marine mammals. Their ecosystems are also very vulnerable to human disturbance and particularly to introduced species, due to their small size. Island groups such as New Zealand and Hawaii have undergone substantial extinctions and losses of habitat. Since the 1950s several organisations and government agencies around the world have worked to restore islands to their original states; New Zealand has used them to hold natural populations of species that would otherwise be unable to survive in the wild. The principal components of island restoration are the removal of introduced species and the reintroduction of native species.