A comparison of alpha and beta diversity patterns of ferns
... In the tropics, taxonomic surrogacy studies of plants have mainly focused on lowland forests (e.g., Duivenvoorden 1994, 1996; Tuomisto and Ruokolainen 2005), and only rarely on montane forest (La Torre-Cuadros et al. 2007). They have mainly considered only selected groups of flowering plants (but se ...
... In the tropics, taxonomic surrogacy studies of plants have mainly focused on lowland forests (e.g., Duivenvoorden 1994, 1996; Tuomisto and Ruokolainen 2005), and only rarely on montane forest (La Torre-Cuadros et al. 2007). They have mainly considered only selected groups of flowering plants (but se ...
1995 Why is the Double-crested Cormorant a Problem
... T h e age of first breeding for Doublecrested Cormorants is unknown for the Great Lakes, but Van de Veen (1973) found that over 20% of breeders of a slowly increasing (8% per year) Pacific coast population were only one to nvo years of age. That the species can breed this early is icself remarkable, ...
... T h e age of first breeding for Doublecrested Cormorants is unknown for the Great Lakes, but Van de Veen (1973) found that over 20% of breeders of a slowly increasing (8% per year) Pacific coast population were only one to nvo years of age. That the species can breed this early is icself remarkable, ...
Individualscale variation, speciesscale differences: inference
... aggregateÕ, rather than Ôanalyse the aggregateÕ; this may not be possible, but more often, the advantages can be simply unrecognised. Ecologists have studied the demographic responses of individuals for a long time, but the species-level parameters estimated in these studies aggregate over the varia ...
... aggregateÕ, rather than Ôanalyse the aggregateÕ; this may not be possible, but more often, the advantages can be simply unrecognised. Ecologists have studied the demographic responses of individuals for a long time, but the species-level parameters estimated in these studies aggregate over the varia ...
Niche-Based vs. Neutral Models of Ecological Communities
... (2) Between colonization-plus-speciation and local extinction at a site; and (3) Between speciation and global extinction among all sites. The other key point of divergence is that niche theory considers differences between the niches of different species to be essential for explaining which species ...
... (2) Between colonization-plus-speciation and local extinction at a site; and (3) Between speciation and global extinction among all sites. The other key point of divergence is that niche theory considers differences between the niches of different species to be essential for explaining which species ...
New Zealand`s Naturally Uncommon Ecosystems
... High–fertility sites are invaded by weeds such as barley grass (Hordeum spp.) and annual exotic herbs spreading from surrounding areas, including via bird dispersal. These ecosystems are vulnerable to serious depletions of burrowing birds and other native fauna due to predation by rats, cats, and st ...
... High–fertility sites are invaded by weeds such as barley grass (Hordeum spp.) and annual exotic herbs spreading from surrounding areas, including via bird dispersal. These ecosystems are vulnerable to serious depletions of burrowing birds and other native fauna due to predation by rats, cats, and st ...
Document
... more than species identified in this research. Previous studies which are mostly done on a monthly basis show changes in the species of algae population and their fluctuations throughout the year. Therefore, some species may disappear during the year and their biomass has a lot of changes over the y ...
... more than species identified in this research. Previous studies which are mostly done on a monthly basis show changes in the species of algae population and their fluctuations throughout the year. Therefore, some species may disappear during the year and their biomass has a lot of changes over the y ...
Ecological Society of America - Wentworth Group of Concerned
... 153o30’ longitude and –26o30’ and –28o00’ latitudes (six 1:100,000 scale map sheets) from southeast Queensland, Australia, as this was an area with relatively high data density from this period. We selected this dataset for its long time frame and non-standardized methodology. Reporting rates on sho ...
... 153o30’ longitude and –26o30’ and –28o00’ latitudes (six 1:100,000 scale map sheets) from southeast Queensland, Australia, as this was an area with relatively high data density from this period. We selected this dataset for its long time frame and non-standardized methodology. Reporting rates on sho ...
Keystone species in seed dispersal networks are mainly
... defined as the potential that a vertex has in accessing or being accessed by other vertices of the same network. Accessibility can be measured to direct (A1) and indirect neighbors (A2). A direct neighbor in the niche overlap network is a species that is directly connected to the target species; an i ...
... defined as the potential that a vertex has in accessing or being accessed by other vertices of the same network. Accessibility can be measured to direct (A1) and indirect neighbors (A2). A direct neighbor in the niche overlap network is a species that is directly connected to the target species; an i ...
Full text in pdf format
... by crustose coralline algae which form a nearly continuous pink carpet. A similar situation is observed on the top surfaces of the rocks and boulders found in the deeper zone (between 15 and 20 m depth). The shallow portion of the coralline zone (between 4 and 15 m) is dominated by the corallines Li ...
... by crustose coralline algae which form a nearly continuous pink carpet. A similar situation is observed on the top surfaces of the rocks and boulders found in the deeper zone (between 15 and 20 m depth). The shallow portion of the coralline zone (between 4 and 15 m) is dominated by the corallines Li ...
EN EN EXPLANATORY MEMORANDUM 1. CONTEXT OF THE
... ecosystem services, especially in geographically and evolutionary isolated ecosystems, such as small islands, and the risks such species pose may be greater due to increased global trade, transport, tourism and climate change. ...
... ecosystem services, especially in geographically and evolutionary isolated ecosystems, such as small islands, and the risks such species pose may be greater due to increased global trade, transport, tourism and climate change. ...
Improving feral animal management - Queensland Murray
... This project will take place across six specific, but large, sites within the Queensland Murray Darling Basin (QMDB). Each site will incorporate several properties in order to accurately determine the scope of damage and control. Three of these sites will have a coordinated control program (baiting, ...
... This project will take place across six specific, but large, sites within the Queensland Murray Darling Basin (QMDB). Each site will incorporate several properties in order to accurately determine the scope of damage and control. Three of these sites will have a coordinated control program (baiting, ...
Attwater`s Prairie-Chicken Business Plan
... environment in which prairie-chickens could live. But those actions did not seem to slow the pace at which the population was declining. Reproduction and survival were low, even on the refuge, because of the biological problems caused by low population size — including breakdown of the highly evolve ...
... environment in which prairie-chickens could live. But those actions did not seem to slow the pace at which the population was declining. Reproduction and survival were low, even on the refuge, because of the biological problems caused by low population size — including breakdown of the highly evolve ...
Hierarchical Bayesian models in ecology: Reconstructing
... with L1-penalized sparse regression (LASSO) and non-linear Bayesian networks with the BDe scoring scheme. In addition, we have applied our method to plant ground coverage data from the western shore of the Outer Hebrides with the objective to infer the ecological interactions. © 2012 Elsevier B.V. A ...
... with L1-penalized sparse regression (LASSO) and non-linear Bayesian networks with the BDe scoring scheme. In addition, we have applied our method to plant ground coverage data from the western shore of the Outer Hebrides with the objective to infer the ecological interactions. © 2012 Elsevier B.V. A ...
Mammals of the Bodoquena Mountains, Mammals of the
... adopted was that of WILSON & REEDER (2005). ...
... adopted was that of WILSON & REEDER (2005). ...
Latest Pleistocene Vertebrates in Western Canada
... temporal overlap and the small samples from both areas, there is no clear evidence as yet that it was earlier in one than the other. A synchronous pattern could suggest a widespread environmental cause, of which the onset of the Younger Dryas cold episode and the arrival of humans as predators would ...
... temporal overlap and the small samples from both areas, there is no clear evidence as yet that it was earlier in one than the other. A synchronous pattern could suggest a widespread environmental cause, of which the onset of the Younger Dryas cold episode and the arrival of humans as predators would ...
Species-specific effects of genetic diversity and species
... had four times four, i.e. 16, sowing positions at 25 cm distance. Drainage ditches were installed between plot rows and all plots were shaded in the first year with black shading net, which attenuated light by ~50%. As saplings grew 1–3 m tall during the course of the experiment, with intermingling ...
... had four times four, i.e. 16, sowing positions at 25 cm distance. Drainage ditches were installed between plot rows and all plots were shaded in the first year with black shading net, which attenuated light by ~50%. As saplings grew 1–3 m tall during the course of the experiment, with intermingling ...
Beavers and biodiversity: the ethics of ecological restoration
... functioning, diversity and dynamism of the specified ecosystem” (Aronson et al., 1993). ...
... functioning, diversity and dynamism of the specified ecosystem” (Aronson et al., 1993). ...
Plant coexistence and the niche
... able to maintain a long-term average net reproductive rate that is R1. Niche axis: a dimension in n-dimensional niche space along which species can ...
... able to maintain a long-term average net reproductive rate that is R1. Niche axis: a dimension in n-dimensional niche space along which species can ...
Nasua nasua - CIRCABC
... The origin of the established population in Majorca seems to be due to a single import of about eight individuals as pets, a decade earlier, which were located in a rural hotel, where an escape or release may have occurred (Mayol et al, 2009). Currently, the property no longer holds this species, ev ...
... The origin of the established population in Majorca seems to be due to a single import of about eight individuals as pets, a decade earlier, which were located in a rural hotel, where an escape or release may have occurred (Mayol et al, 2009). Currently, the property no longer holds this species, ev ...
Insights into regional patterns of Amazonian forest structure
... Insights into regional patterns of Amazonian forest structure, diversity, and dominance from three large terra-firme forest dynamics plots. ...
... Insights into regional patterns of Amazonian forest structure, diversity, and dominance from three large terra-firme forest dynamics plots. ...
alternatives for restoration of hetch hetchy valley
... (there is some question as to whether wolves occurred here once) were endemic to the park but are not now present. 9) It is very possible that granivorous birds and small mammals may recolonize the valley so rapidly and in such great numbers that 'seeds of herbaceous plants needed for vegetative rec ...
... (there is some question as to whether wolves occurred here once) were endemic to the park but are not now present. 9) It is very possible that granivorous birds and small mammals may recolonize the valley so rapidly and in such great numbers that 'seeds of herbaceous plants needed for vegetative rec ...
Full text in pdf format
... port, varying with large and small spatial changes in hydrodynamics (Hewitt et al. 2003). Seasonal differences in the hydrodynamics or punctual disturbance events, such as storms, may be an important conditioning for the benthic community (Hernández-Arana et al. 2003). The wave climate impact on the ...
... port, varying with large and small spatial changes in hydrodynamics (Hewitt et al. 2003). Seasonal differences in the hydrodynamics or punctual disturbance events, such as storms, may be an important conditioning for the benthic community (Hernández-Arana et al. 2003). The wave climate impact on the ...
Fulltext PDF - Indian Academy of Sciences
... may arise in nature, the most prominent being ‘allopatric’ and ‘sympatric’ speciation. Allopatric speciation has been accepted as the most prevalent mode of animal speciation. Allopatric speciation as explained by Ernst Mayr: “A new species develops if a population which has become geographically is ...
... may arise in nature, the most prominent being ‘allopatric’ and ‘sympatric’ speciation. Allopatric speciation has been accepted as the most prevalent mode of animal speciation. Allopatric speciation as explained by Ernst Mayr: “A new species develops if a population which has become geographically is ...
Populations and landscape structure I Organisms/populations and
... The sink population requires dispersal from other sources. The source population resists extinction. The sink population goes extinct repeatedly and is recolonized. ...
... The sink population requires dispersal from other sources. The source population resists extinction. The sink population goes extinct repeatedly and is recolonized. ...
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.