Journal of Chemical, Biological and Physical Sciences Stored
... RESULTS AND DISCUSSION The biomass and productivity of mangrove forests have been studied mainly in terms of wood production, forest conservation, and ecosystem management17-22. The contemporary understanding of the global warming phenomenon, however, has generated interest in the carbon-stocking ab ...
... RESULTS AND DISCUSSION The biomass and productivity of mangrove forests have been studied mainly in terms of wood production, forest conservation, and ecosystem management17-22. The contemporary understanding of the global warming phenomenon, however, has generated interest in the carbon-stocking ab ...
Literature review of gear-based management options
... available on mesh sizes is limited, but the body of evidence suggests that an increase in mesh size to 3.8 cm can result in an increase in catch weight per unit effort in the long term (though this may take a year or more) and a reduction in immature fish in the catch (Mahon and Hunte, 2001; Sary et ...
... available on mesh sizes is limited, but the body of evidence suggests that an increase in mesh size to 3.8 cm can result in an increase in catch weight per unit effort in the long term (though this may take a year or more) and a reduction in immature fish in the catch (Mahon and Hunte, 2001; Sary et ...
Multiple effects of exotic largemouth bass
... species (Tonn and Magnuson 1982; Rahel 1984). These factors affect predatory performance and the efficiency of piscivorous species, and alter prey-predator interaction. For example, increasing habitat structural complexity with aquatic macrophytes, rocks, or coarse woody materials decreases predatory e ...
... species (Tonn and Magnuson 1982; Rahel 1984). These factors affect predatory performance and the efficiency of piscivorous species, and alter prey-predator interaction. For example, increasing habitat structural complexity with aquatic macrophytes, rocks, or coarse woody materials decreases predatory e ...
Changes in plant community composition, not diversity, during a
... varied significantly over time for only J (Table 1). Over time, N alone reduced S and increased J from 2006 to 2009 and as a consequence H0 increased from 2006 to 2008 (Appendix S2). The effects of P on J over time depended on the amount of P added, where in 2007 and 2008, there was higher J in plots ...
... varied significantly over time for only J (Table 1). Over time, N alone reduced S and increased J from 2006 to 2009 and as a consequence H0 increased from 2006 to 2008 (Appendix S2). The effects of P on J over time depended on the amount of P added, where in 2007 and 2008, there was higher J in plots ...
Effects of five southern California macroalgal diets on
... algal species (North & Pearse, 1970; Leighton, 1971; Dayton, 1985). The standing biomass of giant kelp, a preferred food of sea urchins (Leighton, 1971), fluctuates greatly in response to a range of physical and biological processes (Dayton et al., 1999; Reed, Rassweiler & Arkema, 2008; Reed et al., ...
... algal species (North & Pearse, 1970; Leighton, 1971; Dayton, 1985). The standing biomass of giant kelp, a preferred food of sea urchins (Leighton, 1971), fluctuates greatly in response to a range of physical and biological processes (Dayton et al., 1999; Reed, Rassweiler & Arkema, 2008; Reed et al., ...
Caranx hippos (Common Jack)
... detect and respond to elevated dimethylsulfoniopropionate (DMSP), a chemical which is a byproduct made by marine algae and released during foraging by zooplankton. Juvenile C. hippos depend on this because it’s used as a signal for predation, showing areas with high concentrations of plankton. Adult ...
... detect and respond to elevated dimethylsulfoniopropionate (DMSP), a chemical which is a byproduct made by marine algae and released during foraging by zooplankton. Juvenile C. hippos depend on this because it’s used as a signal for predation, showing areas with high concentrations of plankton. Adult ...
Baited technique improves censuses of cryptic fish in complex habitats
... in predator abundance may therefore provide an insight into predation pressure in coral reef fish communities. Despite the recent interest in predation on coral reefs, however, only a few studies (e.g. Williems & Hatcher 1983, Newrnan et al. 1997, Come11 & Kingsford 1998)have examined the abundance ...
... in predator abundance may therefore provide an insight into predation pressure in coral reef fish communities. Despite the recent interest in predation on coral reefs, however, only a few studies (e.g. Williems & Hatcher 1983, Newrnan et al. 1997, Come11 & Kingsford 1998)have examined the abundance ...
Program - The Wildlife Society
... conservation and management and the Endangered Species Act. She is currently the Deputy Director of the Wildlife, Fish and Rare Plants Program in the Forest Service Southwestern Regional Office. EMILY IRWIN – Assistant Director - Fuels and Fire Ecology, US Forest Service, Southwestern Region, Albuqu ...
... conservation and management and the Endangered Species Act. She is currently the Deputy Director of the Wildlife, Fish and Rare Plants Program in the Forest Service Southwestern Regional Office. EMILY IRWIN – Assistant Director - Fuels and Fire Ecology, US Forest Service, Southwestern Region, Albuqu ...
Marine Ecology Progress Series 209:275
... ABSTRACT: Saltmarshes in subtropical Queensland, Australia, are assumed to provide habitat for fish, yet there has been no evidence as to whether fish actually occur on the intertidal flats that constitute the main area of marshes. Nor has there been any assessment of differences in fish use of vege ...
... ABSTRACT: Saltmarshes in subtropical Queensland, Australia, are assumed to provide habitat for fish, yet there has been no evidence as to whether fish actually occur on the intertidal flats that constitute the main area of marshes. Nor has there been any assessment of differences in fish use of vege ...
Results of a food addition experiment in a north-central Chile
... situ responses. Whereas no differences in residency, numbers of stations visited, and trappability were observed, energy compensation ratios greater than one suggest significant immigration in the second year. Thus, food additions elicited strong responses by herbivorous/omnivorous ‘‘core’’ and ‘‘qu ...
... situ responses. Whereas no differences in residency, numbers of stations visited, and trappability were observed, energy compensation ratios greater than one suggest significant immigration in the second year. Thus, food additions elicited strong responses by herbivorous/omnivorous ‘‘core’’ and ‘‘qu ...
empirical rules and assembly theory
... within 20 years of their introduction. American shad invaded the system naturally after being introduced into the Sacramento River in the 1870s; they have maintained runs that spawn in the lower river for over 100 years under conditions similar to those of their native streams on the East coast of N ...
... within 20 years of their introduction. American shad invaded the system naturally after being introduced into the Sacramento River in the 1870s; they have maintained runs that spawn in the lower river for over 100 years under conditions similar to those of their native streams on the East coast of N ...
File - Mr. Greening`s Science
... increased. B) The dodo bird population increased after the birds learned to build their nests in trees. C) Human exploitation and introduced species significantly reduced dodo bird populations. D) The dodo bird population became smaller because they preyed upon the introduced species. 20. Rabbits ar ...
... increased. B) The dodo bird population increased after the birds learned to build their nests in trees. C) Human exploitation and introduced species significantly reduced dodo bird populations. D) The dodo bird population became smaller because they preyed upon the introduced species. 20. Rabbits ar ...
View as PDF - Montana State University
... Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106 ...
... Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106 ...
Speciation
... Of the medicines currently available, about 50% are derived from natural products. At least 120 chemical compounds, derived from 90 plant species, are important drugs currently in use in many countries around the world! By loosing biodiversity, we are losing the chance to discover new medicines that ...
... Of the medicines currently available, about 50% are derived from natural products. At least 120 chemical compounds, derived from 90 plant species, are important drugs currently in use in many countries around the world! By loosing biodiversity, we are losing the chance to discover new medicines that ...
The interplay between environmental conditions and Allee effects
... 1999). The component of fitness referred to in this definition must be measurable, for example, as a change in survival or reproductive rate of an organism with population size or density (Stephens et al. 1999). There are many proposed mechanisms behind the Allee effect including difficulty finding ...
... 1999). The component of fitness referred to in this definition must be measurable, for example, as a change in survival or reproductive rate of an organism with population size or density (Stephens et al. 1999). There are many proposed mechanisms behind the Allee effect including difficulty finding ...
Genetic diversity
... restoring game and other birds in parts of the U.S. where they have become scarce or extinct and to regulate the introduction of birds and animals in areas where they had not existed. All sections but one of the original 1900 Act have been repealed and either restated in or reenacted by other code p ...
... restoring game and other birds in parts of the U.S. where they have become scarce or extinct and to regulate the introduction of birds and animals in areas where they had not existed. All sections but one of the original 1900 Act have been repealed and either restated in or reenacted by other code p ...
4.3 Succession File
... Triggerfish move large rocks on the seafloor to find food. Smaller fish, which could not move the rocks, benefit by getting new feeding opportunities. What type of symbiosis is this? What type of symbiosis occurs when you get a mosquito bite? ...
... Triggerfish move large rocks on the seafloor to find food. Smaller fish, which could not move the rocks, benefit by getting new feeding opportunities. What type of symbiosis is this? What type of symbiosis occurs when you get a mosquito bite? ...
Guidelines for marine ranching and stock enhancement: Draft
... A primary consideration is habitat suitability, i.e. existence of critical habitat characteristics for the life history stage under consideration. Environmental carrying capacity should be considered when deciding on the appropriate number of individuals to bc released into an area. The density of a ...
... A primary consideration is habitat suitability, i.e. existence of critical habitat characteristics for the life history stage under consideration. Environmental carrying capacity should be considered when deciding on the appropriate number of individuals to bc released into an area. The density of a ...
Species Invasions and the Relationships between Species Diversity
... review of evidence from the fossil record of biotic interchanges reveals that the less diverse region is typically more invaded by species than the more speciesrich region. The reason for this could be either that species-poor regions have greater resource availability (there are empty niches), or t ...
... review of evidence from the fossil record of biotic interchanges reveals that the less diverse region is typically more invaded by species than the more speciesrich region. The reason for this could be either that species-poor regions have greater resource availability (there are empty niches), or t ...
Green Crab - Virginia Beach City Public Schools
... to withdraw a blood sample from each Japanese oyster before being used in the experiment. “They had a wound, essentially, and it may be partially related to that,” Burreson said. Whatever the cause, Burreson said the 20 percent mortality rate was not alarmingly high. Although the Japanese oyster pro ...
... to withdraw a blood sample from each Japanese oyster before being used in the experiment. “They had a wound, essentially, and it may be partially related to that,” Burreson said. Whatever the cause, Burreson said the 20 percent mortality rate was not alarmingly high. Although the Japanese oyster pro ...
E Case Study Trondheimsfjord
... name from the "fishing rod" on its head, with which it lures its prey. The species was almost unattended in Norway until for 10-15 years ago. At that time it became a popular restaurant food and gave a good income for the fishermen. Old and very large individuals were caught in the beginning. Specim ...
... name from the "fishing rod" on its head, with which it lures its prey. The species was almost unattended in Norway until for 10-15 years ago. At that time it became a popular restaurant food and gave a good income for the fishermen. Old and very large individuals were caught in the beginning. Specim ...
The dance of the invading jelly-fish
... the periodicity of such phenomena has been relatively well-known (sometimes several centuries!), the mechanisms involved are relatively unknown. It is to be noted that the physiology of these "Cnidaria", which are sometimes smaller than is generally thought, remains an important area for scientific ...
... the periodicity of such phenomena has been relatively well-known (sometimes several centuries!), the mechanisms involved are relatively unknown. It is to be noted that the physiology of these "Cnidaria", which are sometimes smaller than is generally thought, remains an important area for scientific ...
Notes towards Biodiversity Chapter 6
... Some previously postulated causes of mass extinctions may be unlikely or even impossible. A supernova explosion is considered very unlikely and recent research shows that a nearby gamma ray burst is impossible because our galaxy is metal rich. Mass extinctions are considered too extensive and too su ...
... Some previously postulated causes of mass extinctions may be unlikely or even impossible. A supernova explosion is considered very unlikely and recent research shows that a nearby gamma ray burst is impossible because our galaxy is metal rich. Mass extinctions are considered too extensive and too su ...
Advantages and disadvantages of interferencecompetitive ability
... Invaders into established communities must overcome low resource availability. To establish, invaders must either appropriate resources from existing individuals through interference competition or efficiently use the small amount of resource that remains. Although both strategies may be important, th ...
... Invaders into established communities must overcome low resource availability. To establish, invaders must either appropriate resources from existing individuals through interference competition or efficiently use the small amount of resource that remains. Although both strategies may be important, th ...
Overexploitation
Overexploitation, also called overharvesting, refers to harvesting a renewable resource to the point of diminishing returns. Sustained overexploitation can lead to the destruction of the resource. The term applies to natural resources such as: wild medicinal plants, grazing pastures, game animals, fish stocks, forests, and water aquifers.In ecology, overexploitation describes one of the five main activities threatening global biodiversity. Ecologists use the term to describe populations that are harvested at a rate that is unsustainable, given their natural rates of mortality and capacities for reproduction. This can result in extinction at the population level and even extinction of whole species. In conservation biology the term is usually used in the context of human economic activity that involves the taking of biological resources, or organisms, in larger numbers than their populations can withstand. The term is also used and defined somewhat differently in fisheries, hydrology and natural resource management.Overexploitation can lead to resource destruction, including extinctions. However it is also possible for overexploitation to be sustainable, as discussed below in the section on fisheries. In the context of fishing, the term overfishing can be used instead of overexploitation, as can overgrazing in stock management, overlogging in forest management, overdrafting in aquifer management, and endangered species in species monitoring. Overexploitation is not an activity limited to humans. Introduced predators and herbivores, for example, can overexploit native flora and fauna.