CBD Fourth National Report
... Belize in endowed with a very high level of terrestrial and aquatic biodiversity and the largest unbroken barrier reef in the Western Hemisphere. The Mesoamerican Barrier Reef System (MBRS) which is the second in length only to the Great Barrier Reef of Australia stretches the full length of Belize' ...
... Belize in endowed with a very high level of terrestrial and aquatic biodiversity and the largest unbroken barrier reef in the Western Hemisphere. The Mesoamerican Barrier Reef System (MBRS) which is the second in length only to the Great Barrier Reef of Australia stretches the full length of Belize' ...
Effects of introduced round goby (Neogobius melanostomus) on diet
... eel Anguilla anguilla (Linnaeus, 1758). That program has taken place annually since 2007 (compare Neukamm 2009b). Biomass data from the years 2008–2010, later presented in the results section, have been assessed within the above mentioned monitoring program as well. Zander specimens for the months N ...
... eel Anguilla anguilla (Linnaeus, 1758). That program has taken place annually since 2007 (compare Neukamm 2009b). Biomass data from the years 2008–2010, later presented in the results section, have been assessed within the above mentioned monitoring program as well. Zander specimens for the months N ...
Srivastava and Bell 2009
... organisms (e.g. lake acidification: Vinebrooke et al. 2003). Species may also go extinct in tandem because of tight, coevolved interactions. For example, recent estimates suggest that 6300 species of specialist pollinators, parasites 2009 Blackwell Publishing Ltd/CNRS ...
... organisms (e.g. lake acidification: Vinebrooke et al. 2003). Species may also go extinct in tandem because of tight, coevolved interactions. For example, recent estimates suggest that 6300 species of specialist pollinators, parasites 2009 Blackwell Publishing Ltd/CNRS ...
Thesis_fulltext - University of Canterbury
... cases, a variety of biotic and abiotic factors will regulate the relative strengths of predator control and resource limitation of populations (Hunter and Price, 1992). The influence of abiotic and biotic factors on stream invertebrates has concentrated on grazing species and autotrophic systems (se ...
... cases, a variety of biotic and abiotic factors will regulate the relative strengths of predator control and resource limitation of populations (Hunter and Price, 1992). The influence of abiotic and biotic factors on stream invertebrates has concentrated on grazing species and autotrophic systems (se ...
Ecosystem services and biodiversity in Europe
... dramatically, land has come under intensive farming or has been taken for towns and cities, and industrialisation has produced pollution that now threatens the world’s climate. At the same time, there is a crisis affecting many of the organisms that make up ecosystems. Species are being lost at a ra ...
... dramatically, land has come under intensive farming or has been taken for towns and cities, and industrialisation has produced pollution that now threatens the world’s climate. At the same time, there is a crisis affecting many of the organisms that make up ecosystems. Species are being lost at a ra ...
626.pdf
... by a wildfire before final 2007 data could be collected. In 2006, no treatments applied at either site detectably altered the number of tillers produced by bluebunch wheatgrass nor did they affect bluebunch wheatgrass density or biomass in 2007 at Star Mountain. Changes in medusahead density were no ...
... by a wildfire before final 2007 data could be collected. In 2006, no treatments applied at either site detectably altered the number of tillers produced by bluebunch wheatgrass nor did they affect bluebunch wheatgrass density or biomass in 2007 at Star Mountain. Changes in medusahead density were no ...
predator accelerated replacement
... accurately express how helpful all the students and professors have been since I have been here. Steeped in a world of whole-lake experiments, ecosystem ecology, modeling, and statistics, I have learned more about ecology, and science in general, in the past year than I had previously in my entire l ...
... accurately express how helpful all the students and professors have been since I have been here. Steeped in a world of whole-lake experiments, ecosystem ecology, modeling, and statistics, I have learned more about ecology, and science in general, in the past year than I had previously in my entire l ...
pdf
... main period of hard clam larval production in GSB as determined in a pre-BT year (1979) and in 2001, a non-BT year, occurred in June-July. This coincides with the typical mid-summer occurrence of BT, which poses a threat to larvae that are actively feeding on the plankton at this time. Laboratory st ...
... main period of hard clam larval production in GSB as determined in a pre-BT year (1979) and in 2001, a non-BT year, occurred in June-July. This coincides with the typical mid-summer occurrence of BT, which poses a threat to larvae that are actively feeding on the plankton at this time. Laboratory st ...
Allee Effects
... extinction. This fact argues for a thorough understanding of Allee effects and their mechanisms in order to develop sound management practices for a number of environmental issues. An obvious case is the conservation of rare species. It has been shown, for instance, that small patches of the floweri ...
... extinction. This fact argues for a thorough understanding of Allee effects and their mechanisms in order to develop sound management practices for a number of environmental issues. An obvious case is the conservation of rare species. It has been shown, for instance, that small patches of the floweri ...
What is a Trophic Cascade? - College of Forestry
... trophic cascades only occur in aquatic systems. At the same time, each new discovery has added layers of complexity and has increased the potential for confusion or misuse of the term ‘trophic cascade’. The earliest empirical analyses of trophic cascades focused on the potential for predators to lim ...
... trophic cascades only occur in aquatic systems. At the same time, each new discovery has added layers of complexity and has increased the potential for confusion or misuse of the term ‘trophic cascade’. The earliest empirical analyses of trophic cascades focused on the potential for predators to lim ...
Indo-Pacific lionfish are larger and more abundant on invaded reefs
... bottom of box) are given ...
... bottom of box) are given ...
Assessment of Northern Shrimp on the Eastern Scotian Shelf (SFAs
... the population and fishery, and changes in the size of Shrimp available for harvest. The resource is near the southern limit of the species’ distribution where it is thought to be more vulnerable to significant and rapid declines, as has been observed in the adjacent Gulf of Maine stock. The current ...
... the population and fishery, and changes in the size of Shrimp available for harvest. The resource is near the southern limit of the species’ distribution where it is thought to be more vulnerable to significant and rapid declines, as has been observed in the adjacent Gulf of Maine stock. The current ...
TECHNICAL REPORT ��� An Assessment of the Potential Use of
... number of scientific studies in the U.S. and across the world found that introduced Gambusia had negative effects on native invertebrates, fish, and amphibians. Gambusia stocked in small Michigan ponds as recently as the late 1970s failed to establish self-sustaining populations. However, a warming ...
... number of scientific studies in the U.S. and across the world found that introduced Gambusia had negative effects on native invertebrates, fish, and amphibians. Gambusia stocked in small Michigan ponds as recently as the late 1970s failed to establish self-sustaining populations. However, a warming ...
Standard PDF - Wiley Online Library
... of carcasses visited by many scavengers (Selva and Fortuna 2007). This is supported by both theory (Moleón et al. 2014a) and findings of field studies that used ungulate carcasses, where inter-specific interactions among several carrion consumers were frequent (Cortés-Avizanda et al. 2012) and the ...
... of carcasses visited by many scavengers (Selva and Fortuna 2007). This is supported by both theory (Moleón et al. 2014a) and findings of field studies that used ungulate carcasses, where inter-specific interactions among several carrion consumers were frequent (Cortés-Avizanda et al. 2012) and the ...
Chapter 36 – Communities and Ecosystems
... i. Limiting factors keep population at carrying capacity (maximum population that an ecosystem can support) (Fig. 36.4C) ii. Factors 1. Limited resources (Fig. 36.5A) 2. Natural events – e.g. weather (Fig. 36.5B) 3. Human activity – pollution, habitat destruction 4. Predation – predator and prey cyc ...
... i. Limiting factors keep population at carrying capacity (maximum population that an ecosystem can support) (Fig. 36.4C) ii. Factors 1. Limited resources (Fig. 36.5A) 2. Natural events – e.g. weather (Fig. 36.5B) 3. Human activity – pollution, habitat destruction 4. Predation – predator and prey cyc ...
Exploring Crowded Trophic Niche Space in a Novel Many?
... 2004; Clavero et al. 2013). These novel fish assemblages can be very dynamic and unstable (Stein et al. 1995; Havel et al. 2005), may have more trophic positions than before manipulations (Walsworth et al. 2013), and can exhibit decoupled or new predator–prey interactions (Noble 1986; Denlinger et a ...
... 2004; Clavero et al. 2013). These novel fish assemblages can be very dynamic and unstable (Stein et al. 1995; Havel et al. 2005), may have more trophic positions than before manipulations (Walsworth et al. 2013), and can exhibit decoupled or new predator–prey interactions (Noble 1986; Denlinger et a ...
Otolith science entering the 21st century
... Included in this category were a broad suite of studies that used the annual growth pattern in the otolith to estimate the longevity and growth rate of a population or species of fish (Wilson and Nieland 2001; Laidig et al. 2003). If this category had been broadened to include papers that integrated ...
... Included in this category were a broad suite of studies that used the annual growth pattern in the otolith to estimate the longevity and growth rate of a population or species of fish (Wilson and Nieland 2001; Laidig et al. 2003). If this category had been broadened to include papers that integrated ...
Interference in White Bass Reproduction by Two
... formed when a dam causes a stream to inundate a portion of the surrounding land area, leaving large open-water areas where a shallow stream previously existed (Stanford et al. 1996). As this environmental shift occurs, fish assemblages change drastically; some species increase in numbers and move h ...
... formed when a dam causes a stream to inundate a portion of the surrounding land area, leaving large open-water areas where a shallow stream previously existed (Stanford et al. 1996). As this environmental shift occurs, fish assemblages change drastically; some species increase in numbers and move h ...
trait-mediated indirect interactions in a simple aquatic food web
... likely to be widespread (Werner 1992a). Adaptive (or nonadaptive) behavioral responses to the environment can alter a species’ per capita effects on other species and thus lead to TMIIs. For example, many organisms face trade-offs while foraging resulting from the fact that both growth rate and pred ...
... likely to be widespread (Werner 1992a). Adaptive (or nonadaptive) behavioral responses to the environment can alter a species’ per capita effects on other species and thus lead to TMIIs. For example, many organisms face trade-offs while foraging resulting from the fact that both growth rate and pred ...
Conservation Ecology: Human-caused disturbance stimuli as a form
... water, and transportation of xenobiotics and diseases are common causes of a large number of recently reported ecological shifts. It is often the interaction of persistent and multiple synergistic disturbances that causes permanent ecological transitions, rather than the succession of individual sho ...
... water, and transportation of xenobiotics and diseases are common causes of a large number of recently reported ecological shifts. It is often the interaction of persistent and multiple synergistic disturbances that causes permanent ecological transitions, rather than the succession of individual sho ...
report here - Positive Aquaculture Awareness
... that fewer people means healthier salmon stocks: the health of some salmon stocks in Alaska may have a lot to do with the low population density near productive watersheds (Adkison and Finney 2003), although the more favourable ocean conditions there may also be very important. The main argument ma ...
... that fewer people means healthier salmon stocks: the health of some salmon stocks in Alaska may have a lot to do with the low population density near productive watersheds (Adkison and Finney 2003), although the more favourable ocean conditions there may also be very important. The main argument ma ...
Wolverine (Gulo gulo) - Registre public des espèces en péril
... when females are more sedentary, with the implantation of the blastocyst delayed until winter. Wolverines face mortality from predation and starvation. Human-caused mortality factors, such as trapping, hunting and road/railway kill, are also significant, and ...
... when females are more sedentary, with the implantation of the blastocyst delayed until winter. Wolverines face mortality from predation and starvation. Human-caused mortality factors, such as trapping, hunting and road/railway kill, are also significant, and ...
Natural Organic Chemicals on Development
... Japan, and by a Guyer Fellowship, Department of modify their life history and reproductive Zoology, University of Wisconsin-Madison. strategies (e.g., rate of maturation, size Address correspondence to Dr. Stanley Dodson, and number of eggs) in response to Department of Zoology, Birge Hall, Universi ...
... Japan, and by a Guyer Fellowship, Department of modify their life history and reproductive Zoology, University of Wisconsin-Madison. strategies (e.g., rate of maturation, size Address correspondence to Dr. Stanley Dodson, and number of eggs) in response to Department of Zoology, Birge Hall, Universi ...
Final report on Effects of environment on
... have reported a selection of our results. The results of the research programmes are reported under general titles, as most research programmes were intended to provide science in support of two or more objectives. We have appended a full list of publications for those who require further detail. Th ...
... have reported a selection of our results. The results of the research programmes are reported under general titles, as most research programmes were intended to provide science in support of two or more objectives. We have appended a full list of publications for those who require further detail. 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.