Biodiversity under threat in glacier-fed river systems
... Freshwater biodiversity is under threat across the globe1 , with climate change being a significant contributor2,3 . One impact of climate change is the rapid shrinking of glaciers4 , resulting in a reduction in glacial meltwater contribution to river flow in many glacierized catchments5,6 . These c ...
... Freshwater biodiversity is under threat across the globe1 , with climate change being a significant contributor2,3 . One impact of climate change is the rapid shrinking of glaciers4 , resulting in a reduction in glacial meltwater contribution to river flow in many glacierized catchments5,6 . These c ...
Otway - Natural Resources South Australia
... Bull Kelp is a fast growing, brown macroalgae (seaweed). It can grow 10-14 cm per day. It does not have flowers, seeds or roots like other plants. Instead, the plants fix themselves to rocks using a root-like structure called a ‘holdfast’ to prevent being swept away. These are remarkably strong, but ...
... Bull Kelp is a fast growing, brown macroalgae (seaweed). It can grow 10-14 cm per day. It does not have flowers, seeds or roots like other plants. Instead, the plants fix themselves to rocks using a root-like structure called a ‘holdfast’ to prevent being swept away. These are remarkably strong, but ...
Enemy free space and the structure of ecological
... more speciesj differs from victim populations already in the community the less likely enemies are to recognize it as food, or the less likely they are to be able to deal with it successfully (i.e. the lower f j ) and the more likely speciesj is to invade. Likewise small densities of established ene ...
... more speciesj differs from victim populations already in the community the less likely enemies are to recognize it as food, or the less likely they are to be able to deal with it successfully (i.e. the lower f j ) and the more likely speciesj is to invade. Likewise small densities of established ene ...
Multiple scale composition and spatial distribution patterns of the
... plentiful, such as unreliable distinction between white and black spruce. However, we assume that then, as now, black spruce was far more common and that the GLO records of Picea generally refer to Picea mariana. Multiple species abbreviations were used for some species, as well as a single abbrevia ...
... plentiful, such as unreliable distinction between white and black spruce. However, we assume that then, as now, black spruce was far more common and that the GLO records of Picea generally refer to Picea mariana. Multiple species abbreviations were used for some species, as well as a single abbrevia ...
Differences in diet between two rodent species, Mastomys
... species found in fallow land are M. natalensis and G. vicinus, both being nocturnal (Makundi et al. 2009). The mechanism by which these two rodent pest species partition and utilize their food has not been studied. Studies by Odhiambo et al. (2008) and Mulungu et al. (in press) reported that M. nata ...
... species found in fallow land are M. natalensis and G. vicinus, both being nocturnal (Makundi et al. 2009). The mechanism by which these two rodent pest species partition and utilize their food has not been studied. Studies by Odhiambo et al. (2008) and Mulungu et al. (in press) reported that M. nata ...
The OOSTVAARDERSDPLASSEN - Long Now > Media > Uploader
... The area revealed that nature has resiliency. It showed a baseline of a more species-rich marshland and a more complete and more naturally functioning ecosystem. Bird species, such as the Spoonbill (Platalea leucorodia), Great Bittern (Botaurus stellarus), Marsh Harrier (Circus aeruginosus) and Bear ...
... The area revealed that nature has resiliency. It showed a baseline of a more species-rich marshland and a more complete and more naturally functioning ecosystem. Bird species, such as the Spoonbill (Platalea leucorodia), Great Bittern (Botaurus stellarus), Marsh Harrier (Circus aeruginosus) and Bear ...
Woodpeckers as a keystone species
... The importance of wildlife trees Excavated nesting holes and natural cavities resulting from decay are usually found in dead or decaying trees. These trees are commonly called hollow trees, roost trees, senescent trees, cavity trees, den trees, snags or more recently wildlife trees, in recognition o ...
... The importance of wildlife trees Excavated nesting holes and natural cavities resulting from decay are usually found in dead or decaying trees. These trees are commonly called hollow trees, roost trees, senescent trees, cavity trees, den trees, snags or more recently wildlife trees, in recognition o ...
Local diversity of arable weeds increases with landscape
... at five spatial scales are listed in Table 1. In PCA ordinating local and regional parameters simultaneously, at each spatial scale four PCs were extracted (Table 2a), which explained between 82.1% and 83.3% of the total variance. At the smallest spatial scale (landscape sectors of 1 km diameter), PC ...
... at five spatial scales are listed in Table 1. In PCA ordinating local and regional parameters simultaneously, at each spatial scale four PCs were extracted (Table 2a), which explained between 82.1% and 83.3% of the total variance. At the smallest spatial scale (landscape sectors of 1 km diameter), PC ...
Connecticut Warbler
... Habitat types used during the breeding season vary across Minnesota, Wisconsin and Michigan and this phenomenon has also been reported in Canada where regional habitat associations in Ontario are different from those in Saskatchewan. Callog (1994) listed the existence of a well-developed underst ...
... Habitat types used during the breeding season vary across Minnesota, Wisconsin and Michigan and this phenomenon has also been reported in Canada where regional habitat associations in Ontario are different from those in Saskatchewan. Callog (1994) listed the existence of a well-developed underst ...
Cryptic genetic bottlenecks during restoration of an endangered
... future reproduction of restored forest and their long-term viability. If species are highly self-incompatible then breeding between ramets of the same clone is likely to fail. Furthermore, if restored forests are made up of a high proportion of clonal ramets of specific genotypes, this could lead to ...
... future reproduction of restored forest and their long-term viability. If species are highly self-incompatible then breeding between ramets of the same clone is likely to fail. Furthermore, if restored forests are made up of a high proportion of clonal ramets of specific genotypes, this could lead to ...
Definitions
... essential to predict ecosystem responses under different global scenarios or where management seeks to manipulate species composition directly as in complex agroecosystems. • Hypotheses and models must be tested in a wider array of ecosystem types e.g. tropical forests. • To predict and understand c ...
... essential to predict ecosystem responses under different global scenarios or where management seeks to manipulate species composition directly as in complex agroecosystems. • Hypotheses and models must be tested in a wider array of ecosystem types e.g. tropical forests. • To predict and understand c ...
This article discusses the various hypotheses proposed to explain
... found that 5 to 8 years after the clear-cut, the species richness was increased by 30 to 35%. Haeussler pointed out that this increase in diversity came at a price: the clear-cut disturbance stripped the land of important soil organic layers causing a shift in the type of plants colonizing the regio ...
... found that 5 to 8 years after the clear-cut, the species richness was increased by 30 to 35%. Haeussler pointed out that this increase in diversity came at a price: the clear-cut disturbance stripped the land of important soil organic layers causing a shift in the type of plants colonizing the regio ...
Marine habitats: fauna and ecology
... many existing and often contrasting definitions of habitats. Within the 150 defined as having priority in the Habitats Directive, only nine truly marine habitats are considered worthy of protection: sandbanks with shallow permanent seawater cover; meadows of Neptune grass; estuaries; mudflats or san ...
... many existing and often contrasting definitions of habitats. Within the 150 defined as having priority in the Habitats Directive, only nine truly marine habitats are considered worthy of protection: sandbanks with shallow permanent seawater cover; meadows of Neptune grass; estuaries; mudflats or san ...
PDF
... jaguars are dominant over pumas. Despite it is difficult to detect the intraguild predator phenomenon between solitary, forested and low-density species such as jaguars and pumas, there are records of jaguars killing pumas in areas of Brazil, Mexico and Argentina [27–30]. Thus coexisting at a region ...
... jaguars are dominant over pumas. Despite it is difficult to detect the intraguild predator phenomenon between solitary, forested and low-density species such as jaguars and pumas, there are records of jaguars killing pumas in areas of Brazil, Mexico and Argentina [27–30]. Thus coexisting at a region ...
Sample Size Dependence in Measures of Proportional Similarity
... One measure of the proportional similarity of 2 samples, PS,, uses data initially standardized to remove any effect of different sample sizes. The other, PSD, varies with differences in sample sizes of the 2 data sets being compared, or with differences in population densities if equal-sized quadrat ...
... One measure of the proportional similarity of 2 samples, PS,, uses data initially standardized to remove any effect of different sample sizes. The other, PSD, varies with differences in sample sizes of the 2 data sets being compared, or with differences in population densities if equal-sized quadrat ...
A Meta-analysis of Studies on Plant Growth
... comparison of two or more wild plant species. Data for domesticated species or cultivars were not used. All plants had to be grown either as isolated individuals or in monoculture, and all species within a study had to be grown under identical conditions. Many of the studies presented several compa ...
... comparison of two or more wild plant species. Data for domesticated species or cultivars were not used. All plants had to be grown either as isolated individuals or in monoculture, and all species within a study had to be grown under identical conditions. Many of the studies presented several compa ...
Marine range shifts and species introductions
... We also excluded, due to their reliance on human activities, species that have passed through human-made canals such as the Suez Canal and Panama Canal and then spread after such passage, as well as native species that were probably transported by humans. However, we acknowledge that some expanders ...
... We also excluded, due to their reliance on human activities, species that have passed through human-made canals such as the Suez Canal and Panama Canal and then spread after such passage, as well as native species that were probably transported by humans. However, we acknowledge that some expanders ...
Where the Wild Things Are: Designing for Pollinators
... Where the Wild Things Are: Designing for Pollinators ...
... Where the Wild Things Are: Designing for Pollinators ...
The Extinction Crisis
... in the past or predicted. – Effects due to humans – Distant Past • Correlation between human population growth and the number of extinctions (Figure 3.1) ...
... in the past or predicted. – Effects due to humans – Distant Past • Correlation between human population growth and the number of extinctions (Figure 3.1) ...
The OOSTVAARDERSDPLASSEN
... ‘Anecdotes and the shifting baseline syndrome of fisheries’ as ‘the Shifting Baseline Syndrome’(Pauly, 1995). He stated: ’Essentially, this syndrome has arisen because each generation of fisheries scientists accepts as a baseline the stock size and species composition that occurred at the beginning ...
... ‘Anecdotes and the shifting baseline syndrome of fisheries’ as ‘the Shifting Baseline Syndrome’(Pauly, 1995). He stated: ’Essentially, this syndrome has arisen because each generation of fisheries scientists accepts as a baseline the stock size and species composition that occurred at the beginning ...
Ecological succession - Northwest ISD Moodle
... continue throughout succession. As each species colonizes an area, it changes environmental conditions. The new conditions may cause some populations to increase and others to decrease. ...
... continue throughout succession. As each species colonizes an area, it changes environmental conditions. The new conditions may cause some populations to increase and others to decrease. ...
Persistent negative effects of pesticides on biodiversity and
... Immediately after the aphids had been placed in the field, the numbers of aphids present were recorded. Thereafter, the labels were checked four more times during 30 h: around 6 p.m. of the first day, at 8 a.m., 1 p.m. and about 6 p.m. on the following day, the exact time varying depending on the stud ...
... Immediately after the aphids had been placed in the field, the numbers of aphids present were recorded. Thereafter, the labels were checked four more times during 30 h: around 6 p.m. of the first day, at 8 a.m., 1 p.m. and about 6 p.m. on the following day, the exact time varying depending on the stud ...
Towards a trait-based quantification of species
... the links between plant traits and survival remain rarely explored because of the difficulty to follow seedling and adult survival in the field. Even if the connection between population vital rates and plant functional traits is not yet elucidated (but see Poorter et al. 2008 for recent advances in ...
... the links between plant traits and survival remain rarely explored because of the difficulty to follow seedling and adult survival in the field. Even if the connection between population vital rates and plant functional traits is not yet elucidated (but see Poorter et al. 2008 for recent advances in ...
Toro, H. "Pollination of Prosopis tamarugo in the Atacama Desert"
... However, the synchronic blooming of Cesalpinia aphylla, the only native species abundant in the area besides Prosopis, is clearly an important nectar and pollen resource in the area. In the absence of Algarrobia, C. mixta prefers P. tamarugo rather than the flowers of C. aphylla. The latter is polli ...
... However, the synchronic blooming of Cesalpinia aphylla, the only native species abundant in the area besides Prosopis, is clearly an important nectar and pollen resource in the area. In the absence of Algarrobia, C. mixta prefers P. tamarugo rather than the flowers of C. aphylla. The latter is polli ...
The role of dispersal in shaping plant community Kathryn M. Flinn
... squares is proportional to the value plotted. The percentage value indicates the amount of variation explained by all forward-selected PCNM variables. Thus, panel (a) shows spatial variation in plant community composition. Symbols in panels (b–e) show the sign and magnitude of the most significant P ...
... squares is proportional to the value plotted. The percentage value indicates the amount of variation explained by all forward-selected PCNM variables. Thus, panel (a) shows spatial variation in plant community composition. Symbols in panels (b–e) show the sign and magnitude of the most significant P ...
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.