Science and Economics in the Management of an Invasive Species
... costs cut substantially into resource rents. Dewees and colleagues (2004) explain that the fishery has been “fully and intensely” exploited for at least 40 years. Although there is a moratorium on entry in this fishery, regulations do not limit fishing effort because fishery participants are not res ...
... costs cut substantially into resource rents. Dewees and colleagues (2004) explain that the fishery has been “fully and intensely” exploited for at least 40 years. Although there is a moratorium on entry in this fishery, regulations do not limit fishing effort because fishery participants are not res ...
biophysical overview of the laurentian channel
... distribution, and can be influenced by occasional large catches. These trawl surveys also do not capture large pelagic fish and most sharks. Nonetheless, it was considered that this provided a reasonable snapshot of relative distribution of demeral species inside and outside the AOI. Redfish species ...
... distribution, and can be influenced by occasional large catches. These trawl surveys also do not capture large pelagic fish and most sharks. Nonetheless, it was considered that this provided a reasonable snapshot of relative distribution of demeral species inside and outside the AOI. Redfish species ...
Parasites that change predator or prey behaviour can have keystone
... There is an increasing realization that parasitism can play as pivotal a role as predation in structuring biological communities, often via indirect interactions with non-host species [1,2]. Indirect interactions occur when the impact of one species on another affects populations of a third species; ...
... There is an increasing realization that parasitism can play as pivotal a role as predation in structuring biological communities, often via indirect interactions with non-host species [1,2]. Indirect interactions occur when the impact of one species on another affects populations of a third species; ...
plant species diversity in natural and managed forests of the pacific
... However, research that focuses on the consequences of management activities for biological diversity has been biased heavily toward the needs and responses of wildlife (e.g., Ruggiero et al. 1991, Orians 1992:papers therein, Hansen et al. 1993, McComb et al. 1993). Despite a long history of silvicul ...
... However, research that focuses on the consequences of management activities for biological diversity has been biased heavily toward the needs and responses of wildlife (e.g., Ruggiero et al. 1991, Orians 1992:papers therein, Hansen et al. 1993, McComb et al. 1993). Despite a long history of silvicul ...
Moving beyond assumptions to understand abundance distributions
... physical environment and the distribution of their ranges. These species have ranges that can be thousands of kilometers long, but <0.1 km wide at all points. Defining the range edge and center is relatively simple for these species because their range is essentially one-dimensional. Only two points ...
... physical environment and the distribution of their ranges. These species have ranges that can be thousands of kilometers long, but <0.1 km wide at all points. Defining the range edge and center is relatively simple for these species because their range is essentially one-dimensional. Only two points ...
Seasonal species interactions minimize the impact of species
... has reached up to 96 cm and covered the ground from November until April. The temperature in January, the coldest month, averages −4.8°C. June, July, and August are the warmest months with mean daily temperatures of 17°C, and the highest insolation, on average 7 h/d compared to 48 min/d in December ...
... has reached up to 96 cm and covered the ground from November until April. The temperature in January, the coldest month, averages −4.8°C. June, July, and August are the warmest months with mean daily temperatures of 17°C, and the highest insolation, on average 7 h/d compared to 48 min/d in December ...
Trends in the extinction of carnivores in Madagascar B. Cartagena
... To evaluate the risk of extinction, we generated a table whereby we averaged the standardized scores for the following factors affecting Malagasy carnivores: distribution range, species information, dietary breadth, dietary overlap, habitat breadth, strata overlap, activity pattern overlap, forested ...
... To evaluate the risk of extinction, we generated a table whereby we averaged the standardized scores for the following factors affecting Malagasy carnivores: distribution range, species information, dietary breadth, dietary overlap, habitat breadth, strata overlap, activity pattern overlap, forested ...
Community and ecosystem effects of intraspecific genetic diversity in
... transplants were removed to prevent sexual diversification. Fall clippings were sorted by species and weighed in 2005 and 2006, but biomass estimates did not include flowering stalks. In August 2007, all plants were harvested at 2.5 cm height, separately by individual where possible (grasses and Succi ...
... transplants were removed to prevent sexual diversification. Fall clippings were sorted by species and weighed in 2005 and 2006, but biomass estimates did not include flowering stalks. In August 2007, all plants were harvested at 2.5 cm height, separately by individual where possible (grasses and Succi ...
Population Management Plan Submission
... the event that there is disagreement between the parties. Consequently decisions on PMPs are likely to be challenged through judicial review proceedings as frequently happens in the case of decisions made under the Fisheries Act which follow a similar procedure to that proposed by DOC for PMPs. Judi ...
... the event that there is disagreement between the parties. Consequently decisions on PMPs are likely to be challenged through judicial review proceedings as frequently happens in the case of decisions made under the Fisheries Act which follow a similar procedure to that proposed by DOC for PMPs. Judi ...
Diversity, evolutionary specialization and geographic distribution of
... a large number of similar species. With one exception (see Results) they belong to the subgenus Decacrema, which is easily identified by its 10-segmented antennae. Within this subgenus, however, the taxonomic relationships are still obscure (as it is also the case within the genus Macaranga. We have ...
... a large number of similar species. With one exception (see Results) they belong to the subgenus Decacrema, which is easily identified by its 10-segmented antennae. Within this subgenus, however, the taxonomic relationships are still obscure (as it is also the case within the genus Macaranga. We have ...
Tiburones gato y parientes (familia Scyliorhinidae)
... General description 1,2 The family Scyliorhinidae is the largest shark family, with at least 15 genera and over 100 species. Their common name, catsharks, likely derives from their elongated, cat-like eyes, although their scientific name is based on the Greek words, “Scylla,” meaning “a shark,” and ...
... General description 1,2 The family Scyliorhinidae is the largest shark family, with at least 15 genera and over 100 species. Their common name, catsharks, likely derives from their elongated, cat-like eyes, although their scientific name is based on the Greek words, “Scylla,” meaning “a shark,” and ...
Spanish - SciELO Costa Rica
... During our fieldwork, on four occasions we found traces of poachers and farmers regularly reported presence of illegal hunters. In this sense, it is important to emphasize that three of the most coveted species by hunters (paca, armadillo and white-tailed deer; Redford & Robinson, 1987), showed a te ...
... During our fieldwork, on four occasions we found traces of poachers and farmers regularly reported presence of illegal hunters. In this sense, it is important to emphasize that three of the most coveted species by hunters (paca, armadillo and white-tailed deer; Redford & Robinson, 1987), showed a te ...
The Effect of Sowing Season on the Reliability of Direct
... observations they make in the field. This presents a strong case for regular monitoring of sites for several years after sowing. Simple methods such as counting the number of germinants over a sample length of seeding line for each species will give an indication of success. These records can then b ...
... observations they make in the field. This presents a strong case for regular monitoring of sites for several years after sowing. Simple methods such as counting the number of germinants over a sample length of seeding line for each species will give an indication of success. These records can then b ...
restoration of mediterranean - type woodlands and shrublands
... In spite of the similarities in climate, many striking differences can be found among MCRs, in addition to fire regime. As mentioned, historical differences in land use practices, including the time span of degradation processes, socio-economic dependence on local resources and cultural perceptions ...
... In spite of the similarities in climate, many striking differences can be found among MCRs, in addition to fire regime. As mentioned, historical differences in land use practices, including the time span of degradation processes, socio-economic dependence on local resources and cultural perceptions ...
Response of macroarthropod assemblages to the loss
... Abstract. In eastern North American forests, eastern hemlock (Tsuga canadensis) is a foundation species. As hemlock is lost from forests due to the invasive hemlock woolly adelgid (Adelges tsugae) and preemptive salvage logging, the structure of assemblages of species associated with hemlock is expe ...
... Abstract. In eastern North American forests, eastern hemlock (Tsuga canadensis) is a foundation species. As hemlock is lost from forests due to the invasive hemlock woolly adelgid (Adelges tsugae) and preemptive salvage logging, the structure of assemblages of species associated with hemlock is expe ...
Chapter 13 How Ecosystems Change
... • Fundamental Niche = The total niche that an organism could potentially use within an ecosystem. ...
... • Fundamental Niche = The total niche that an organism could potentially use within an ecosystem. ...
Big APES Exam review questions for each unit
... Toxicity, Pesticides and Agriculture Unit 1. Compare and contrast the first and second “green” revolutions. 2. List seven things that can be done to increase agricultural production while reducing environmental degradation. Explain each idea as needed. 3. Describe the main causes of world hunger an ...
... Toxicity, Pesticides and Agriculture Unit 1. Compare and contrast the first and second “green” revolutions. 2. List seven things that can be done to increase agricultural production while reducing environmental degradation. Explain each idea as needed. 3. Describe the main causes of world hunger an ...
Wilson et al. constrained lability in Penstemon and
... the 41 ornithophilous species had been included, it is very likely that the number of origins would have been even higher. In particular, preliminary studies suggest three additional origins that resulted in Penstemon utahensis, Penstemon murrayanus, and Penstemon cardinalis (Wilson et al., 2006). O ...
... the 41 ornithophilous species had been included, it is very likely that the number of origins would have been even higher. In particular, preliminary studies suggest three additional origins that resulted in Penstemon utahensis, Penstemon murrayanus, and Penstemon cardinalis (Wilson et al., 2006). O ...
Assessing the diversity, abundance and
... and in the lagoon are maintained by a weir on the junction of Goobang and Yarrabandai Creek. Water flow over the weir creates a series of shallow, temporary pools within the channel. Water levels within the main channel behind the weir remained relatively constant during the study period. However, h ...
... and in the lagoon are maintained by a weir on the junction of Goobang and Yarrabandai Creek. Water flow over the weir creates a series of shallow, temporary pools within the channel. Water levels within the main channel behind the weir remained relatively constant during the study period. However, h ...
Untitled - For Studerende
... overall structure of ecological networks by identifying modules within the network and assigns each species with a functional role that describes their structural importance for the network. The topology of complex ecological networks does not have a uniform distribution of interactions among speci ...
... overall structure of ecological networks by identifying modules within the network and assigns each species with a functional role that describes their structural importance for the network. The topology of complex ecological networks does not have a uniform distribution of interactions among speci ...
Effects of alien species on plant-pollinator interactions: how can
... pollination. Especially important in this regard are alien plant species that are highly attractive for pollinators. Such species often display conspicuous advertizements such as large, showy flowers, offer high rewards for their visitors, and/or employ a supergeneralist pollination strategy (Morale ...
... pollination. Especially important in this regard are alien plant species that are highly attractive for pollinators. Such species often display conspicuous advertizements such as large, showy flowers, offer high rewards for their visitors, and/or employ a supergeneralist pollination strategy (Morale ...
Slajd 1
... Tries to link both disciplines and to explain larges scale ecological patterns and processes in space and time Important: The focus is on explanation and model building and not on simple description. Modern ecology is not a faunistic or floristic exercise. It uses larges scale data sets to build and ...
... Tries to link both disciplines and to explain larges scale ecological patterns and processes in space and time Important: The focus is on explanation and model building and not on simple description. Modern ecology is not a faunistic or floristic exercise. It uses larges scale data sets to build and ...
Facilitative interactions among aquatic invaders
... in which one species benefits at the expense of another (e.g., predation, parasitism); amensalism, in which one species is inhibited while the other is unaffected; and antagonism, which is defined here as any mutually detrimental interaction (e.g., resource competition, interference, allelopathy). O ...
... in which one species benefits at the expense of another (e.g., predation, parasitism); amensalism, in which one species is inhibited while the other is unaffected; and antagonism, which is defined here as any mutually detrimental interaction (e.g., resource competition, interference, allelopathy). O ...
Classification of Vegetation - Montana Natural Heritage Program
... Site-based sampling divides the vegetated area into units that reflect important environmental and topographic gradients (e.g., slope, aspect, elevation, moisture regime, soil type). Transects that contain the strongest environmental gradients in a region are selected in order to optimize the amount ...
... Site-based sampling divides the vegetated area into units that reflect important environmental and topographic gradients (e.g., slope, aspect, elevation, moisture regime, soil type). Transects that contain the strongest environmental gradients in a region are selected in order to optimize the amount ...
pptx
... “If some mechanism promotes the coexistence of two or more species, each species must be able to increase when it is rare and the others are at their typical abundances; this invasibility criterion is fundamental evidence for species coexistence regardless of the mechanism.” “some subset of the co-o ...
... “If some mechanism promotes the coexistence of two or more species, each species must be able to increase when it is rare and the others are at their typical abundances; this invasibility criterion is fundamental evidence for species coexistence regardless of the mechanism.” “some subset of the co-o ...
Bifrenaria
Bifrenaria, abbreviated Bif. in horticultural trade, is a genus of plant in family Orchidaceae. It contains 20 species found in Panama, Trinidad and South America. There are no known uses for them, but their abundant, and at first glance artificial, flowers, make them favorites of orchid growers.The genus can be split in two clearly distinct groups: one of highly robust plants with large flowers, that encompass the first species to be classified under the genus Bifrenaria; other of more delicate plants with smaller flowers occasionally classified as Stenocoryne or Adipe. There are two additional species that are normally classified as Bifrenaria, but which molecular analysis indicate to belong to different orchid groups entirely. One is Bifrenaria grandis which is endemic to Bolívia and which is now placed in Lacaena, and Bifrenaria steyermarkii, an inhabitant of the northern Amazon Forest, which does not have an alternative classification.