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mop4_31_ssap_black_tailed_godwit_0
... again since the mid-1990s (Altenburg & Wymenga 2000, Teunissen et al. 2004). The present annual decline is estimated at c. 5% on a national scale (Teunissen & Soldaat 2006), resulting in a current population of c. 55,000 pairs (data SOVON, W. Teunissen pers. com.). This number may even be lower, as ...
... again since the mid-1990s (Altenburg & Wymenga 2000, Teunissen et al. 2004). The present annual decline is estimated at c. 5% on a national scale (Teunissen & Soldaat 2006), resulting in a current population of c. 55,000 pairs (data SOVON, W. Teunissen pers. com.). This number may even be lower, as ...
Predicting species` maximum dispersal distances from simple plant
... yet known. We used cross-validation techniques and a global data set (576 plant species) to measure the predictive power of simple plant traits to estimate species’ maximum dispersal distances. Including dispersal syndrome (wind, animal, ant, ballistic, and no special syndrome), growth form (tree, s ...
... yet known. We used cross-validation techniques and a global data set (576 plant species) to measure the predictive power of simple plant traits to estimate species’ maximum dispersal distances. Including dispersal syndrome (wind, animal, ant, ballistic, and no special syndrome), growth form (tree, s ...
Cod predation on polar cod under warming conditions in the Barents
... • Loss of ice = spawning habitat (position of spawning site, larvae transported into Kara Sea?) • Increased temperature= thermal habitat • Changes in prey: zooplankton species composition and production • Changes in predators : cod/other predators • fishing is currently negligible Do you have recomm ...
... • Loss of ice = spawning habitat (position of spawning site, larvae transported into Kara Sea?) • Increased temperature= thermal habitat • Changes in prey: zooplankton species composition and production • Changes in predators : cod/other predators • fishing is currently negligible Do you have recomm ...
Seed size and plant strategy across the whole life cycle
... Model I vs model II analyses Model II (also known as standardised major axis or reduced major axis) analyses are appropriate when it is not clear whether y is being predicted from x or vice versa (McArdle 1988, Sokal and Rohlf 1995). Thus, model II slopes were more appropriate for the initial analys ...
... Model I vs model II analyses Model II (also known as standardised major axis or reduced major axis) analyses are appropriate when it is not clear whether y is being predicted from x or vice versa (McArdle 1988, Sokal and Rohlf 1995). Thus, model II slopes were more appropriate for the initial analys ...
Eco07
... Coevolution is a type of community evolution. Coevolution is the joint evolution of two or more noninterbreeding species that have a close ecological relationship, such as plants and herbivores, large organisms and their microorganism symbionts, or parasites and their hosts. Through reciprocal s ...
... Coevolution is a type of community evolution. Coevolution is the joint evolution of two or more noninterbreeding species that have a close ecological relationship, such as plants and herbivores, large organisms and their microorganism symbionts, or parasites and their hosts. Through reciprocal s ...
The Response of Natural Enemies to Selective Insecticides Applied
... The rows were sampled using 10 pendulum swings per row for a total of 20 pendulum swings per plot. A pendulum swing consisted of a 180-degree pass across the selected row, with a returning 180-degree pass. The contents of the sweep-net were emptied into a one-gallon plastic bag and stored at ⫺20⬚C u ...
... The rows were sampled using 10 pendulum swings per row for a total of 20 pendulum swings per plot. A pendulum swing consisted of a 180-degree pass across the selected row, with a returning 180-degree pass. The contents of the sweep-net were emptied into a one-gallon plastic bag and stored at ⫺20⬚C u ...
A conceptual model for conservation planning
... (deMaynadier and Hunter, 1994; Johnston, 1995). Species like forest elephants structure ecosystems in a variety of different ways, by localizing and redistributing energy and materials (e.g. aggregations of grazers; seed dispersers), by physically altering the landscape as a form of disturbance agen ...
... (deMaynadier and Hunter, 1994; Johnston, 1995). Species like forest elephants structure ecosystems in a variety of different ways, by localizing and redistributing energy and materials (e.g. aggregations of grazers; seed dispersers), by physically altering the landscape as a form of disturbance agen ...
Competitive co-existence caused by adaptive predators
... mechanistic explanation for species co-existence in communities with keystone predators is that predation keeps the competitively dominant consumer species at low densities, which reduces interspecific competition and allows the competitors to survive indefinitely. In this article, I consider a diam ...
... mechanistic explanation for species co-existence in communities with keystone predators is that predation keeps the competitively dominant consumer species at low densities, which reduces interspecific competition and allows the competitors to survive indefinitely. In this article, I consider a diam ...
Thesis - Rufford Small Grants
... selected habitat how foraging animals should partition time between competing fitness enhancing activities. In the former, with predation risk as an additional factor, I show the habitat selection theory still applies but there are new and interesting wrinkles brought on by conflicting tradeoffs of ...
... selected habitat how foraging animals should partition time between competing fitness enhancing activities. In the former, with predation risk as an additional factor, I show the habitat selection theory still applies but there are new and interesting wrinkles brought on by conflicting tradeoffs of ...
Competition as a factor underlying the abundance of an uncommon
... Karban, 1989; Hunter & Price, 1992; Damman, 1993; Denno et al., 2002). Historically, there has been heated debate over the relative importance of competition, hostplant resources (bottom-up factors), and natural enemies (top-down forces) in structuring herbivore communities (Hairston et al., 1960; P ...
... Karban, 1989; Hunter & Price, 1992; Damman, 1993; Denno et al., 2002). Historically, there has been heated debate over the relative importance of competition, hostplant resources (bottom-up factors), and natural enemies (top-down forces) in structuring herbivore communities (Hairston et al., 1960; P ...
Habitat preferences and stocking densities of Bontebok in the
... If we assume that diet quality determines habitat quality, faecal analysis can be used to directly assess the quality of an area. This method assumes that diet quality determines the faecal contents; this relationship has been used and shown to be true for a large number of herbivores (Erasmus et al ...
... If we assume that diet quality determines habitat quality, faecal analysis can be used to directly assess the quality of an area. This method assumes that diet quality determines the faecal contents; this relationship has been used and shown to be true for a large number of herbivores (Erasmus et al ...
Review on hard coral recruitment (Cnidaria: Scleractinia) in Colombia
... natural substrate. We recommend consulting other authors (10, 21-23) for further discussion regarding these two stages. For this review, we took into account all the studies focused on juvenile corals. Juvenile corals were defined as an individual polyp (e.g. a solitary polyp such as Scolymia sp.) o ...
... natural substrate. We recommend consulting other authors (10, 21-23) for further discussion regarding these two stages. For this review, we took into account all the studies focused on juvenile corals. Juvenile corals were defined as an individual polyp (e.g. a solitary polyp such as Scolymia sp.) o ...
Chapter Objective Essays These must be in complete sentences. BE
... 36.9 Explain how the structure of the world’s human population has changed and continues to change. Describe the key factors that affect human population growth. (4pts) ...
... 36.9 Explain how the structure of the world’s human population has changed and continues to change. Describe the key factors that affect human population growth. (4pts) ...
RECOVERY PLAN FOR THE BERMUDA SKINK, Eumeces longirostris
... International Union for the Conservation of Nature and Natural Resources (IUCN) as Critically Endangered (IUCN 1996; 2005) and, more recently has been listed under Bermuda law (Protected Species Act 2003) as Critically Endangered (CR, B1, B2b, c, d, e) in accordance with IUCN criteria. Its listing u ...
... International Union for the Conservation of Nature and Natural Resources (IUCN) as Critically Endangered (IUCN 1996; 2005) and, more recently has been listed under Bermuda law (Protected Species Act 2003) as Critically Endangered (CR, B1, B2b, c, d, e) in accordance with IUCN criteria. Its listing u ...
Epipelagic and mesopelagic fishes in the southern California
... much of this diverse assemblage appears to respond coherently to environmental forcing. Koslow et al. (2011) reported that the dominant pattern in the CalCOFI ichthyoplankton time series (or first principal component (PC)) was almost wholly dominated by mesopelagic fishes, including migrators and non- ...
... much of this diverse assemblage appears to respond coherently to environmental forcing. Koslow et al. (2011) reported that the dominant pattern in the CalCOFI ichthyoplankton time series (or first principal component (PC)) was almost wholly dominated by mesopelagic fishes, including migrators and non- ...
Trait-dependent modification of facilitation on cobble
... two weeks. Immediately behind each replicate, permanent quadrats (1 m2) were marked and the abundance of forbs within was quantified on haphazardly chosen days throughout the growing season. Multiple species of forb were present but only one, Suaeda linearis (family Chenopodiaceae, commonly known as ...
... two weeks. Immediately behind each replicate, permanent quadrats (1 m2) were marked and the abundance of forbs within was quantified on haphazardly chosen days throughout the growing season. Multiple species of forb were present but only one, Suaeda linearis (family Chenopodiaceae, commonly known as ...
Habitat-dependent foraging in a classic predatorа/prey system: a
... habitat differences in predation risk. Relatively few studies have considered, either in theory or in practice, simultaneous patterns in prey density. Linear predator /prey models predict that prey habitat preferences should switch toward the safer habitat with increasing prey and predator densitie ...
... habitat differences in predation risk. Relatively few studies have considered, either in theory or in practice, simultaneous patterns in prey density. Linear predator /prey models predict that prey habitat preferences should switch toward the safer habitat with increasing prey and predator densitie ...
SPECIES ACCOUNT – MOOSE (m-alal)
... Winter range can include clearcut areas as well as forested sites. Moose browse tends to be most abundant in natural openings as well as those areas that have been recently disturbed through fire or clearcut logging. As such, structural stage is an important variable which is strongly correlated wit ...
... Winter range can include clearcut areas as well as forested sites. Moose browse tends to be most abundant in natural openings as well as those areas that have been recently disturbed through fire or clearcut logging. As such, structural stage is an important variable which is strongly correlated wit ...
Adaptive physiology of heteromyid rodents
... which emphasizes that survival in this species has been dependent upon a series of mutually supporting adaptations of which its locomotor equipment is the most obvious." Recently, investigators have measured the actual costs of locomotion through indirect calorimetry of mammals nmning on treadmills. ...
... which emphasizes that survival in this species has been dependent upon a series of mutually supporting adaptations of which its locomotor equipment is the most obvious." Recently, investigators have measured the actual costs of locomotion through indirect calorimetry of mammals nmning on treadmills. ...
Assessment approach - The Department of State Development
... and elevated areas, soil and climatic differences) and land use history, there is a large variation in the extent, condition and trend of all the MNES values. This assessment considers MNES values on a habitat basis (for species), regional ecosystem basis for threatened ecological communities and a ...
... and elevated areas, soil and climatic differences) and land use history, there is a large variation in the extent, condition and trend of all the MNES values. This assessment considers MNES values on a habitat basis (for species), regional ecosystem basis for threatened ecological communities and a ...
Are dingoes a trophic regulator in arid Australia? A comparison of
... Abstract The direct and indirect interactions that large mammalian carnivores have with other species can have far-reaching effects on ecosystems. In recent years there has been growing interest in the role that Australia’s largest terrestrial predator, the dingo, may have in structuring ecosystems. ...
... Abstract The direct and indirect interactions that large mammalian carnivores have with other species can have far-reaching effects on ecosystems. In recent years there has been growing interest in the role that Australia’s largest terrestrial predator, the dingo, may have in structuring ecosystems. ...
Have Introduced Brown Trout (Salmo Trutta)
... Biological invasions are one of the greatest threats to biodiversity and the persistence of threatened species (Allan and Flecker 1993; Sakai et al. 2001; Dudgeon et al. 2006), and the widespread introduction of exotic species into freshwaters is considered one of the greatest threats to these ecosy ...
... Biological invasions are one of the greatest threats to biodiversity and the persistence of threatened species (Allan and Flecker 1993; Sakai et al. 2001; Dudgeon et al. 2006), and the widespread introduction of exotic species into freshwaters is considered one of the greatest threats to these ecosy ...
Caribbean acroporid coral hybrids are viable across life history stages
... ABSTRACT: The Caribbean corals, Acropora palmata (elkhorn) and A. cervicornis (staghorn), are abundant in fossil records but recent disease outbreaks have led to unprecedented losses. Fused staghorn coral, A. prolifera, is an F1 hybrid with an intermediate morphology to the parental species. The hyb ...
... ABSTRACT: The Caribbean corals, Acropora palmata (elkhorn) and A. cervicornis (staghorn), are abundant in fossil records but recent disease outbreaks have led to unprecedented losses. Fused staghorn coral, A. prolifera, is an F1 hybrid with an intermediate morphology to the parental species. The hyb ...
fluence benthic community assemblages in seagrass Examining how landscapes in
... conducted trawl and core sampling in less disturbed sites throughout Casco Bay. Both site and habitat influenced the distribution and abundance of the benthos captured in core sampling efforts in 2005. Crustacean densities were 2 to 3 times greater in the seagrass habitat regardless of site, but did ...
... conducted trawl and core sampling in less disturbed sites throughout Casco Bay. Both site and habitat influenced the distribution and abundance of the benthos captured in core sampling efforts in 2005. Crustacean densities were 2 to 3 times greater in the seagrass habitat regardless of site, but did ...
Zoology of Porites cylindrica: potential for use in
... a correlation between coral morphology and the repair and regeneration of sustained injuries. Hall (1996) discovered that regenerative ability could be ranked according to morphological attributes (arborescent>bushy>tubular>massive). The recovery rates for each growth form did not signicantly diffe ...
... a correlation between coral morphology and the repair and regeneration of sustained injuries. Hall (1996) discovered that regenerative ability could be ranked according to morphological attributes (arborescent>bushy>tubular>massive). The recovery rates for each growth form did not signicantly diffe ...