Developing New Morphological, Geographic, and
... this species. Monitoring and identification of H. naniflora have often been problematic due to the overlap in flower and leaf morphology with other members of the Hexastylis Heterophylla subgroup. In order to best devise management strategies for this imperiled species, it is vital to understand th ...
... this species. Monitoring and identification of H. naniflora have often been problematic due to the overlap in flower and leaf morphology with other members of the Hexastylis Heterophylla subgroup. In order to best devise management strategies for this imperiled species, it is vital to understand th ...
Rewilding and Biodiversity
... though the effects are similar when they are greatly diminished in abundance.) The critical role of keystone species is gaining acceptance (Terborgh et al. 1999). Conservatively, though, the role of keystones might still be categorized as a hypothesis, its validity depending on the ecological contex ...
... though the effects are similar when they are greatly diminished in abundance.) The critical role of keystone species is gaining acceptance (Terborgh et al. 1999). Conservatively, though, the role of keystones might still be categorized as a hypothesis, its validity depending on the ecological contex ...
Raphicerus campestris - Endangered Wildlife Trust
... the eastern Northern Cape and western Free State provinces (Stenkewitz et al. 2010). Similarly, recent field surveys in the North West Province confirmed an abundant population in the Kalahari vegetation types (Power 2014). However, lower densities are expected in areas without suitable vegetation c ...
... the eastern Northern Cape and western Free State provinces (Stenkewitz et al. 2010). Similarly, recent field surveys in the North West Province confirmed an abundant population in the Kalahari vegetation types (Power 2014). However, lower densities are expected in areas without suitable vegetation c ...
Effect of Some Environmental Factors on Plant Species Diversity in
... British chalk grasslands (Bennie et al., 2006; X. Gong et al., 2008). The difference of plant species composition and productivity, longterm operating soil weathering, and erosion processes are usually accelerated on southfacing slopes (Rech et al., 2001), resulting in different soil properties of n ...
... British chalk grasslands (Bennie et al., 2006; X. Gong et al., 2008). The difference of plant species composition and productivity, longterm operating soil weathering, and erosion processes are usually accelerated on southfacing slopes (Rech et al., 2001), resulting in different soil properties of n ...
special-status species` biology and likelihood-of
... Terms for Likelihood of Occurrence in the Study Area NONE: Given the available information, it is judged that the species does not occur. This determination is based on some combination of these facts: 1) The study area is clearly outside the current range based on available information and/or 2) th ...
... Terms for Likelihood of Occurrence in the Study Area NONE: Given the available information, it is judged that the species does not occur. This determination is based on some combination of these facts: 1) The study area is clearly outside the current range based on available information and/or 2) th ...
corridors may not improve the conservation value of small reserves
... clear-cutting on three sides, with the fourth side connected to a 100 m wide riparian forest buffer strip; such strips are left by forest companies to protect water quality in lakes). In a companion study, birds were mistnetted in the buffer strips and in control areas along lakes to measure whether ...
... clear-cutting on three sides, with the fourth side connected to a 100 m wide riparian forest buffer strip; such strips are left by forest companies to protect water quality in lakes). In a companion study, birds were mistnetted in the buffer strips and in control areas along lakes to measure whether ...
Gunārs Pētersons. Distribution patterns and seasonal migration of bat
... Complete data on the geographical distribution, territorial and seasonal pattern of occurrence of bat species are essential prerequisites to ensure their conservation. A major study on the status of bat species in Latvia in the period before 1977 was carried out by Ināra Buša (Буша 1980), summarize ...
... Complete data on the geographical distribution, territorial and seasonal pattern of occurrence of bat species are essential prerequisites to ensure their conservation. A major study on the status of bat species in Latvia in the period before 1977 was carried out by Ināra Buša (Буша 1980), summarize ...
Ch11 Lecture 1.competition
... Potential biases in these analyses include failure of researchers to publish studies that show no significant effects, and a tendency for investigators to study species they suspect will show competition. Still, they document that competition is common, though not ubiquitous. ...
... Potential biases in these analyses include failure of researchers to publish studies that show no significant effects, and a tendency for investigators to study species they suspect will show competition. Still, they document that competition is common, though not ubiquitous. ...
The architecture of mutualistic networks minimizes competition and
... biodiversity than do their randomizations. Nestedness may be correlated with other properties of network structure such as degree distribution or disassortativity, and the overall contribution to biodiversity increase may therefore be a composite of all these properties that shape the architecture o ...
... biodiversity than do their randomizations. Nestedness may be correlated with other properties of network structure such as degree distribution or disassortativity, and the overall contribution to biodiversity increase may therefore be a composite of all these properties that shape the architecture o ...
How geographic distance and depth drive ecological variability and
... concept of species richness, seeking common approaches and frameworks for measuring population, community, and ecosystem variability. All methods aim at reducing the high dimensionality of species abundance data to summarize community structure and each one is sensitive to specific aspects of struct ...
... concept of species richness, seeking common approaches and frameworks for measuring population, community, and ecosystem variability. All methods aim at reducing the high dimensionality of species abundance data to summarize community structure and each one is sensitive to specific aspects of struct ...
2014 Bee Niche and N..
... adjacency matrices and represented as bipartite graphs. We calculated the degree of specialization in diet and activity time using the index H2′ (see Blüthgen et al 2006), which varies from 0 (generalized interactions) to 1 (specialized interactions). This index (H2′) characterizes the degree of spe ...
... adjacency matrices and represented as bipartite graphs. We calculated the degree of specialization in diet and activity time using the index H2′ (see Blüthgen et al 2006), which varies from 0 (generalized interactions) to 1 (specialized interactions). This index (H2′) characterizes the degree of spe ...
Hydrobiologia
... world, multispecies assemblages of large branchiopods are a frequent phenomenon. Therefore, the erronerous idea of ‘one-phyllopod-per-habitat’ (Weise, 1964) must be abandoned. Furthermore, the old ‘speciesincompatibility theory’ of Gissler (sensu Moore, 1963), appears inconsistent with field observa ...
... world, multispecies assemblages of large branchiopods are a frequent phenomenon. Therefore, the erronerous idea of ‘one-phyllopod-per-habitat’ (Weise, 1964) must be abandoned. Furthermore, the old ‘speciesincompatibility theory’ of Gissler (sensu Moore, 1963), appears inconsistent with field observa ...
How similar can co-occurring species be in the presence of
... communities result from a number of processes occurring at different spatiotemporal scales. New species arise vía speciation and immigration. Species abundances are shaped by drift and selection, as well as ongoing dispersal. Therefore, selection, speciation, dispersal and ecological drift (understo ...
... communities result from a number of processes occurring at different spatiotemporal scales. New species arise vía speciation and immigration. Species abundances are shaped by drift and selection, as well as ongoing dispersal. Therefore, selection, speciation, dispersal and ecological drift (understo ...
Species richness and aggregation effects on the productivity of
... complementarity and positive species interaction or facilitation.2, 10 – 12 The sampling effect is the dominance of particular species. This component is suggested based on the theory that a highly diverse ecosystem is likely to contain some superior species, which have strong effects on ecosystem f ...
... complementarity and positive species interaction or facilitation.2, 10 – 12 The sampling effect is the dominance of particular species. This component is suggested based on the theory that a highly diverse ecosystem is likely to contain some superior species, which have strong effects on ecosystem f ...
Extending the concept of keystone species to
... characteristics. In the context of keystones, the focus has been on size, biomass or similar metrics of weight (‘dominance effects’; Power et al. 1996). The proposed model was assuming simply that the impact of each entity should be proportional to their relative weight (dominance status). This come ...
... characteristics. In the context of keystones, the focus has been on size, biomass or similar metrics of weight (‘dominance effects’; Power et al. 1996). The proposed model was assuming simply that the impact of each entity should be proportional to their relative weight (dominance status). This come ...
16, Biological Resources
... Low reproductive rates Requiring specialized breeding areas Having specialized feeding habitats © 2015 John Wiley & Sons, Inc. All rights reserved. ...
... Low reproductive rates Requiring specialized breeding areas Having specialized feeding habitats © 2015 John Wiley & Sons, Inc. All rights reserved. ...
Evolving to Invade Lesson plan
... o 2 large bowls, two different colors o 1 smooth kitchen glove o 1 fuzzy winter glove ...
... o 2 large bowls, two different colors o 1 smooth kitchen glove o 1 fuzzy winter glove ...
SHRIMP TRAWLER BY-CATCH DIVERSITY AND
... (Diplobatis ommata), and Golden Cownose Ray (Rhinoptera steindachneri), all of which are listed on the IUCN Red List under varying degrees of severity from Critically Endangered to Near Threatened. Additionally there are several species common in the by-catch, which have commercial importance to the ...
... (Diplobatis ommata), and Golden Cownose Ray (Rhinoptera steindachneri), all of which are listed on the IUCN Red List under varying degrees of severity from Critically Endangered to Near Threatened. Additionally there are several species common in the by-catch, which have commercial importance to the ...
Trophic niches of thirteen damselfishes (Pomacentridae) at the
... found to be empty (Table 1). One specimen of Abudefduf vaigiensis and one of Chromis ternatensis had stomachs filled with a great number of demersal fish eggs. This finding is informative about feeding opportunism, but these two specimens were not included for calculating the mean diet composition. ...
... found to be empty (Table 1). One specimen of Abudefduf vaigiensis and one of Chromis ternatensis had stomachs filled with a great number of demersal fish eggs. This finding is informative about feeding opportunism, but these two specimens were not included for calculating the mean diet composition. ...
Midterm 2
... a) Using the map and axes provided, draw and label the curves that define the equilibrium conditions of San Nicolas and Santa Cruz islands (two curves for each island). Be sure to label each curve. (6 pts) ...
... a) Using the map and axes provided, draw and label the curves that define the equilibrium conditions of San Nicolas and Santa Cruz islands (two curves for each island). Be sure to label each curve. (6 pts) ...
Detecting the influence of climatic variables on species distributions
... may be occurring to avoid competitive interactions (Losos et al., 2003). Alternatively, if evidence for niche partitioning (e.g. microhabitat segregation) is lacking, then resources may not be limiting, and species can occur together without niche or character shifts. Coexistence may also be facilit ...
... may be occurring to avoid competitive interactions (Losos et al., 2003). Alternatively, if evidence for niche partitioning (e.g. microhabitat segregation) is lacking, then resources may not be limiting, and species can occur together without niche or character shifts. Coexistence may also be facilit ...
STUDY PERFORMANCE REPORT
... predation and declines in yellow perch, northern pike, and other fish species. The sport fishery for yellow perch in 2009, however, declined and was trending differently than the abundance of perch in the fish community survey. Analysis of the 2009 St. Marys River fish community survey has begun. A ...
... predation and declines in yellow perch, northern pike, and other fish species. The sport fishery for yellow perch in 2009, however, declined and was trending differently than the abundance of perch in the fish community survey. Analysis of the 2009 St. Marys River fish community survey has begun. A ...
AFO WOS 2004 abstracts v3 - Wilson Ornithological Society
... presence of varying levels of human activity. Several habitat and potential human disturbance variables were measured at 120 active nest sites and 162 random sites across the state. Discriminant analysis separated nest sites from random sites primarily on the basis of nest tree diameter and distance ...
... presence of varying levels of human activity. Several habitat and potential human disturbance variables were measured at 120 active nest sites and 162 random sites across the state. Discriminant analysis separated nest sites from random sites primarily on the basis of nest tree diameter and distance ...
Chapter 56 lecture outline
... Here are some reasons conservation biologists are concerned about species loss. o The International Union for Conservation of Natural Resources (IUCN) reports that 12% of nearly 10,000 known bird species and 20% of nearly 5,000 known mammal species are threatened with extinction. o The Center for Pl ...
... Here are some reasons conservation biologists are concerned about species loss. o The International Union for Conservation of Natural Resources (IUCN) reports that 12% of nearly 10,000 known bird species and 20% of nearly 5,000 known mammal species are threatened with extinction. o The Center for Pl ...