Alien invasive fish species in Polish waters: an overview
... A b s t r a c t. For the last 800 years, 35 alien fish species have been introduced, mainly intentionally, in Polish inland waters. The paper reviews the present state of alien fish fauna in Poland, with special attention paid to those considered to be invasive. Till now 26 species have been reporte ...
... A b s t r a c t. For the last 800 years, 35 alien fish species have been introduced, mainly intentionally, in Polish inland waters. The paper reviews the present state of alien fish fauna in Poland, with special attention paid to those considered to be invasive. Till now 26 species have been reporte ...
Lesson Overview
... paramecia (P. aurelia and P. caudatum) were first grown in separate cultures (dashed lines) . In separate cultures, but under the same conditions, both populations grew. However, when both species were grown together in the same culture (solid line), one species outcompeted the other, and the less c ...
... paramecia (P. aurelia and P. caudatum) were first grown in separate cultures (dashed lines) . In separate cultures, but under the same conditions, both populations grew. However, when both species were grown together in the same culture (solid line), one species outcompeted the other, and the less c ...
Food web structure and habitat loss
... Previous theoretical studies of habitat loss have investigated single-species (Lande 1987; Bascompte & Sole 1996), two-species (Nee & May 1992; May 1994; Holt 1997; Nee et al. 1997; Bascompte & Sole 1998a,b; Namba et al. 1999; Swihart et al. 2001) and n-competing species models (Hastings 1980; Til ...
... Previous theoretical studies of habitat loss have investigated single-species (Lande 1987; Bascompte & Sole 1996), two-species (Nee & May 1992; May 1994; Holt 1997; Nee et al. 1997; Bascompte & Sole 1998a,b; Namba et al. 1999; Swihart et al. 2001) and n-competing species models (Hastings 1980; Til ...
CH09 IM
... 4. Cyclic fluctuations occur over a regular time period, generally a multiple year cycle. 5. Irregular behavior is poorly understood. Some scientists attribute irregular behavior to chaos in the system; others disagree. I. Interactions between predators and their prey change in cycles and appear to ...
... 4. Cyclic fluctuations occur over a regular time period, generally a multiple year cycle. 5. Irregular behavior is poorly understood. Some scientists attribute irregular behavior to chaos in the system; others disagree. I. Interactions between predators and their prey change in cycles and appear to ...
A newly identified population of Gambusia affinis (Baird and Girard
... aggression from G. affinis. The presence of predatory fish may, alongside food availability, limit the Gambusia population size (Hildebrand 1919). However the factors that regulate invasive Gambusia populations are complex and quantitative understanding of their population dynamics is poor (Pyke 200 ...
... aggression from G. affinis. The presence of predatory fish may, alongside food availability, limit the Gambusia population size (Hildebrand 1919). However the factors that regulate invasive Gambusia populations are complex and quantitative understanding of their population dynamics is poor (Pyke 200 ...
paper
... headquarters. From there, we hiked approximately 20 km into the park where we reached the river campsite of Behobeho. The following couple of days; we hiked the various grassland habitats within the vicinity of Behobeho and surveyed the landscape with binoculars for animals. After five nights, we hi ...
... headquarters. From there, we hiked approximately 20 km into the park where we reached the river campsite of Behobeho. The following couple of days; we hiked the various grassland habitats within the vicinity of Behobeho and surveyed the landscape with binoculars for animals. After five nights, we hi ...
Geologic Setting - cuyamacageography
... San Diego County can be divided between three distinct geomorphic regions: the Coastal Plain region as exposed west of the Peninsular Ranges, the Peninsular Range region, and the Salton Trough region as exposed east of the Peninsular Ranges. This geomorphic division reflects a basic geologic differe ...
... San Diego County can be divided between three distinct geomorphic regions: the Coastal Plain region as exposed west of the Peninsular Ranges, the Peninsular Range region, and the Salton Trough region as exposed east of the Peninsular Ranges. This geomorphic division reflects a basic geologic differe ...
Are invasive plant species better competitors than native plant
... alien species can threaten the persistence of native species (Parker and Reichard 1998), presumably because of the negative effects of competition from the invasive alien on native species populations. On the other hand, disturbance, which results in reduced competition and an increase of resources ...
... alien species can threaten the persistence of native species (Parker and Reichard 1998), presumably because of the negative effects of competition from the invasive alien on native species populations. On the other hand, disturbance, which results in reduced competition and an increase of resources ...
A Detailed Study of Theraphosid Spiders of Sri Lanka
... active predators, attacking prey from their hiding places and injecting venom to immobilize them. During our field observations, seven adults were found in tree holes and five were on tree barks. Since these spiders are not web dwelling, they may choose trees as suitable microhabitats where they can ...
... active predators, attacking prey from their hiding places and injecting venom to immobilize them. During our field observations, seven adults were found in tree holes and five were on tree barks. Since these spiders are not web dwelling, they may choose trees as suitable microhabitats where they can ...
report - DIGITAL.CSIC, el repositorio institucional
... Kruess & Tscharntke 1994; Bascompte & Sole’ 1998a; Gilbert et al. 1998; Holt et al. 1999; Steffan-Dewenter & Tscharntke 2000). This is in agreement with empirical observations in host-parasitoid (Kruess & Tscharntke 1994) and butterfly—plant communities (Steffan-Dewenter & Tscharntke 2000). Conseque ...
... Kruess & Tscharntke 1994; Bascompte & Sole’ 1998a; Gilbert et al. 1998; Holt et al. 1999; Steffan-Dewenter & Tscharntke 2000). This is in agreement with empirical observations in host-parasitoid (Kruess & Tscharntke 1994) and butterfly—plant communities (Steffan-Dewenter & Tscharntke 2000). Conseque ...
NOBANIS – Invasive Alien Species Fact Sheet Procyon lotor
... includes removal of minks and raccoons from protected important bird areas. Using trapping methods could possibly be more effective. The only effective trapping of raccoons has been done around fenced nesting sites of great bustrads Otis tarda inside of protected areas around Berlin in Germany (pers ...
... includes removal of minks and raccoons from protected important bird areas. Using trapping methods could possibly be more effective. The only effective trapping of raccoons has been done around fenced nesting sites of great bustrads Otis tarda inside of protected areas around Berlin in Germany (pers ...
The importance of having two species instead of one in
... kelp Lessonia nigrescens. We review phylogenetic, biological and ecological evidence indicating that this economically important intertidal species is composed of two cryptic species. In the face of increasing global demand for kelp, an intensified impact of harvesting pressure is observed around th ...
... kelp Lessonia nigrescens. We review phylogenetic, biological and ecological evidence indicating that this economically important intertidal species is composed of two cryptic species. In the face of increasing global demand for kelp, an intensified impact of harvesting pressure is observed around th ...
EPBC Act Protected Matters Report
... stage. Maps have been collated from a range of sources at various resolutions. Not all species listed under the EPBC Act have been mapped (see below) and therefore a report is a general guide only. Where available data supports mapping, the type of presence that can be determined from the data is in ...
... stage. Maps have been collated from a range of sources at various resolutions. Not all species listed under the EPBC Act have been mapped (see below) and therefore a report is a general guide only. Where available data supports mapping, the type of presence that can be determined from the data is in ...
http://www.ca.blm.gov/pdfs/palmsprings_pdfs/pdfs_coachella/Glossary.pdf
... USFWS currently has on file substantial information on their biological vulnerability and threat(s) to support proposals to list them as endangered or threatened species. Issuance of proposed rules for listing are presently precluded by other higher priority listing actions. Canopy Cover: The cover ...
... USFWS currently has on file substantial information on their biological vulnerability and threat(s) to support proposals to list them as endangered or threatened species. Issuance of proposed rules for listing are presently precluded by other higher priority listing actions. Canopy Cover: The cover ...
2.4.2 Zonation and Succession
... Succession is the change in species composition in an ecosystem over time. It may occur on bare ground (primary succession) when soil formation starts the process or where soil already formed but the vegetation has been removed (secondary succession). Early in succession, gross primary productivity ...
... Succession is the change in species composition in an ecosystem over time. It may occur on bare ground (primary succession) when soil formation starts the process or where soil already formed but the vegetation has been removed (secondary succession). Early in succession, gross primary productivity ...
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... laundry, shower, and galley sink wastes, or any other discharge incidental to the normal o~erationof a vessel. " ...
... laundry, shower, and galley sink wastes, or any other discharge incidental to the normal o~erationof a vessel. " ...
Adaptive Radiation - Princeton University Press
... polar bears to highly social honey bees; and varying in numerous other ways in exploiting the environment for food, avoiding their enemies, and reproducing. How is all this variation to be explained? Adaptive radiations provide rich material for seeking answers to these questions because they compri ...
... polar bears to highly social honey bees; and varying in numerous other ways in exploiting the environment for food, avoiding their enemies, and reproducing. How is all this variation to be explained? Adaptive radiations provide rich material for seeking answers to these questions because they compri ...
Appropriate Use of NatureServe Conservation Status Assessments
... NatureServe conservation status ranks are a valuable resource for government agencies such as the U.S. Fish and Wildlife Service, the Canadian Wildlife Service, and others responsible for administration of state and provincial species conservation laws. These agencies consider NatureServe status ran ...
... NatureServe conservation status ranks are a valuable resource for government agencies such as the U.S. Fish and Wildlife Service, the Canadian Wildlife Service, and others responsible for administration of state and provincial species conservation laws. These agencies consider NatureServe status ran ...
harmful nonindigenous species
... internationally recognized wetlands. South Florida's low natural diversity of freshwater fishes is one factor that has made it vulnerable to invasion by nonindigenous fish. South of Lake Okeechobee, nonindigenous species already make up over 50% of the inland fish fauna (Courtenay 1994a). Disturbanc ...
... internationally recognized wetlands. South Florida's low natural diversity of freshwater fishes is one factor that has made it vulnerable to invasion by nonindigenous fish. South of Lake Okeechobee, nonindigenous species already make up over 50% of the inland fish fauna (Courtenay 1994a). Disturbanc ...
Inventory and designation of marine Natura 2000 areas
... Avilés Canyon System, Banco de Galicia, the Mud Volcanoes of the Gulf of Cadiz, South of Almeria-Seco de los Olivos, Alboran marine reserve, Columbretes Islands marine reserve, Western Canyon System of the Gulf of Lions, Minorca Channel, Banco de la Concepción and the East and South Lanzarote-Fuerte ...
... Avilés Canyon System, Banco de Galicia, the Mud Volcanoes of the Gulf of Cadiz, South of Almeria-Seco de los Olivos, Alboran marine reserve, Columbretes Islands marine reserve, Western Canyon System of the Gulf of Lions, Minorca Channel, Banco de la Concepción and the East and South Lanzarote-Fuerte ...
Floristic Study of the Serpentine Sites in the Eastern Alps
... Ruderal (R) plants tolerant to anthropogenic effects represent 28.6% of the flora. Among them 21.3% are disturbance-tolerant natural species (DT), usually clear cut plants, which utilize the nutrients being available after disturbance. Their RGRmax values are high. 21.3% of the flora belong to this ...
... Ruderal (R) plants tolerant to anthropogenic effects represent 28.6% of the flora. Among them 21.3% are disturbance-tolerant natural species (DT), usually clear cut plants, which utilize the nutrients being available after disturbance. Their RGRmax values are high. 21.3% of the flora belong to this ...
Monitoring Mannual Terrestrial
... diversity, stress hormone levels, _these should not be done frequently since they are intrusive on wildlife freedom Number of spill incidences, heavy metal levels in the food chain, presence and level of heavy metals in water and soils ...
... diversity, stress hormone levels, _these should not be done frequently since they are intrusive on wildlife freedom Number of spill incidences, heavy metal levels in the food chain, presence and level of heavy metals in water and soils ...
spider competition in structurally simple
... the response by the other species in numbers, web height, and fecundity. Spiller found evidence of both exploitative and interference competition in this pair of spiders. Removing the much more common Cyclosa resulted in an increase in the body size and fecundity of Metepeira. The mechanism to expla ...
... the response by the other species in numbers, web height, and fecundity. Spiller found evidence of both exploitative and interference competition in this pair of spiders. Removing the much more common Cyclosa resulted in an increase in the body size and fecundity of Metepeira. The mechanism to expla ...
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.