Spatial patterns of weeds along a gradient of landscape complexity
... random or regular spatial patterns. We hypothesize that spatial patterns could be related to ecological attributes of weeds (b), in particular seed dispersal type, frequency of occurrence and degree of habitat specialization. We hypothesize that landscape complexity exerts a direct influence on the ...
... random or regular spatial patterns. We hypothesize that spatial patterns could be related to ecological attributes of weeds (b), in particular seed dispersal type, frequency of occurrence and degree of habitat specialization. We hypothesize that landscape complexity exerts a direct influence on the ...
14. MEGAPODES IN NORTHERN AUSTRALIA: A SUMMARY OF RECENT RESEARCH
... The Orange-footed Scrubfowl has by far the largest distribution of all megapodes, being found in a multitude of islands from the Lesser Sunda Islands near Bali in Indonesia, across northern Australia and most of southern New Guinea to the Trobrian Islands off the eastern tip of Papua (Jones et al. 1 ...
... The Orange-footed Scrubfowl has by far the largest distribution of all megapodes, being found in a multitude of islands from the Lesser Sunda Islands near Bali in Indonesia, across northern Australia and most of southern New Guinea to the Trobrian Islands off the eastern tip of Papua (Jones et al. 1 ...
Meadow viper Vipera ursinii
... Loss of habitat is the principal cause of decline. Human persecution and illegal collection are also very important and may now be major threats in areas where at least the habitat is safeguarded. • Habitat destruction: This has been particularly important in lowland populations, where most of the s ...
... Loss of habitat is the principal cause of decline. Human persecution and illegal collection are also very important and may now be major threats in areas where at least the habitat is safeguarded. • Habitat destruction: This has been particularly important in lowland populations, where most of the s ...
Behavior and conservation: a bridge too far?
... might matter under a set of hypothetical conditions. For example, what might happen to a population if a given fishing net size caught only males; and how might groups hunt or defend themselves if they were each reduced to a handful of individuals? By contrast, wildlife managers trying to save specifi ...
... might matter under a set of hypothetical conditions. For example, what might happen to a population if a given fishing net size caught only males; and how might groups hunt or defend themselves if they were each reduced to a handful of individuals? By contrast, wildlife managers trying to save specifi ...
Speciation
... Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
... Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
Biotechnology and Plant Health International Regulatory Approaches
... the conservation of biological diversity, the sustainable use of its components, and the fair and equitable sharing of the benefits from the use of genetic resources. Activities with direct phytosanitary impacts are its provisions on ”Alien Species” and ”Alien Invasive Species”. International Plant ...
... the conservation of biological diversity, the sustainable use of its components, and the fair and equitable sharing of the benefits from the use of genetic resources. Activities with direct phytosanitary impacts are its provisions on ”Alien Species” and ”Alien Invasive Species”. International Plant ...
evaluating perennial candidates for domestication
... Glover et al. 2010; while the potential physiological and genetic obstacles to combining high grain yield and multi-year lifespan—and suggestions for how these obstacles can be overcomehave also been explored elsewhere (DeHaan et al. 2007; Van Tassel et al. 2010). In this volume given this rationale ...
... Glover et al. 2010; while the potential physiological and genetic obstacles to combining high grain yield and multi-year lifespan—and suggestions for how these obstacles can be overcomehave also been explored elsewhere (DeHaan et al. 2007; Van Tassel et al. 2010). In this volume given this rationale ...
LETTER Eutrophication weakens stabilizing effects of diversity in natural grasslands
... are influenced by a variety of factors including nutrient availability, climatic conditions and anthropogenic land use9–11. It is also likely that diversity is not the only, or even the primary, driver of the stability of ANPP20,21; however, few experiments have simultaneously addressed changes in b ...
... are influenced by a variety of factors including nutrient availability, climatic conditions and anthropogenic land use9–11. It is also likely that diversity is not the only, or even the primary, driver of the stability of ANPP20,21; however, few experiments have simultaneously addressed changes in b ...
Ocular morphology in antarctic notothenioid fishes
... choroid body, and its presence was considered a primitive character state for notothenioids. The choroid body was absent in phyletically derived groups. The choroid body was especially large in Dissostichus mawsoni, the only species with a rod dominated retina. Retinae were 154-279 pm thick with lay ...
... choroid body, and its presence was considered a primitive character state for notothenioids. The choroid body was absent in phyletically derived groups. The choroid body was especially large in Dissostichus mawsoni, the only species with a rod dominated retina. Retinae were 154-279 pm thick with lay ...
Director Species Listing Section Threatened Species Scientific
... It can be argued that impacts resulting from overbrowsing are isolated to a few poorly managed populations within Victoria and should not be considered a deciding factor in assessing threats to the national population. Considering current state managed populations, protection under state legislation ...
... It can be argued that impacts resulting from overbrowsing are isolated to a few poorly managed populations within Victoria and should not be considered a deciding factor in assessing threats to the national population. Considering current state managed populations, protection under state legislation ...
plant invasiveness assessment system for alaska
... Identify reason for selection, or evidence of weedy history: Canada bluegrass is used as a pasture grass and for erosion control (Rutledge and McLendon 1996, Hitchock and Cronquist 1973). However, it is not used as widely as Kentucky bluegrass (USDA 2002). Rational: Sources of information: Hitchcock ...
... Identify reason for selection, or evidence of weedy history: Canada bluegrass is used as a pasture grass and for erosion control (Rutledge and McLendon 1996, Hitchock and Cronquist 1973). However, it is not used as widely as Kentucky bluegrass (USDA 2002). Rational: Sources of information: Hitchcock ...
Relative importance of endogenous and exogenous mechanisms in
... relative importance. Namely, mechanisms either depend on exogenous forces or structure (e.g., variability in limiting factors or spatial structure) or depend on internal competitive dynamics that can result in increased resource limitation or variability in limiting factors (Tilman, 1982; Chesson, 2 ...
... relative importance. Namely, mechanisms either depend on exogenous forces or structure (e.g., variability in limiting factors or spatial structure) or depend on internal competitive dynamics that can result in increased resource limitation or variability in limiting factors (Tilman, 1982; Chesson, 2 ...
Biodiversity in intensive grasslands
... grasslands have already been greatly intensified in the past, and hence little further losses in biodiversity are now expected. On the other hand, greater reduction in biodiversity caused by intensification will probably occur in the future in the northern part of central and Eastern Europe (from Au ...
... grasslands have already been greatly intensified in the past, and hence little further losses in biodiversity are now expected. On the other hand, greater reduction in biodiversity caused by intensification will probably occur in the future in the northern part of central and Eastern Europe (from Au ...
Towra Point Nature Reserve Ramsar site: Ecological character
... and was present at the time of listing; this has been confirmed from aerial photographs taken around this time (Wilton 2002). Wetland types J: coastal brackish lagoons and K: coastal freshwater lagoons describe the character of the three lagoons which were known at the time of listing (ALS 1977). We ...
... and was present at the time of listing; this has been confirmed from aerial photographs taken around this time (Wilton 2002). Wetland types J: coastal brackish lagoons and K: coastal freshwater lagoons describe the character of the three lagoons which were known at the time of listing (ALS 1977). We ...
Population density of North American elk
... of the U.S. Forest Service. Starkey (45°130 N, 118°310 W) is situated in the Blue Mountains of northeastern Oregon, USA, and is located 35 km southwest of La Grande, Oregon. Elevations on Starkey range from 1,120 to 1,500 m. Starkey encompasses 10,125 ha, and since 1987 ...
... of the U.S. Forest Service. Starkey (45°130 N, 118°310 W) is situated in the Blue Mountains of northeastern Oregon, USA, and is located 35 km southwest of La Grande, Oregon. Elevations on Starkey range from 1,120 to 1,500 m. Starkey encompasses 10,125 ha, and since 1987 ...
UNEP/CMS/ScC18/Doc.10.1
... undertaken at an appropriate level (species or management unit level), but measures may be implemented at the national level. For species already covered by existing CMS instruments, those action plans should be developed under those instruments. For other species, range states should work collabora ...
... undertaken at an appropriate level (species or management unit level), but measures may be implemented at the national level. For species already covered by existing CMS instruments, those action plans should be developed under those instruments. For other species, range states should work collabora ...
How Science Works – Trophic Levels – Fishing Down the Food Chain
... categories into which a species could be fitted. So, many fish were put into trophic level three because they consume zooplankton (trophic level two) which in turn consume phytoplankton (trophic level one). ...
... categories into which a species could be fitted. So, many fish were put into trophic level three because they consume zooplankton (trophic level two) which in turn consume phytoplankton (trophic level one). ...
intermediate disturbance hypothesis
... been argued against IDH), then how can GCC ... operate?”. Leaving aside what ‘storage species’ might be, I wrote: “It has been suggested that N.Z. has a deficit of early-successional species”. Early successional species are found, under IDH, after a disturbance; they are not usually found in GCC. Th ...
... been argued against IDH), then how can GCC ... operate?”. Leaving aside what ‘storage species’ might be, I wrote: “It has been suggested that N.Z. has a deficit of early-successional species”. Early successional species are found, under IDH, after a disturbance; they are not usually found in GCC. Th ...
Listening when there is no sexual signalling? Maintenance of
... quantiWed (Hoy 1992). Since the Miocene bats have become a signiWcant predation risk and can be considered as a major force in shaping acoustic behaviour in tettigoniids (Hoy 1992; Yager 1999; Lehmann 2003; Fullard et al. 2004). The ensiferan genus Poecilimon, including more than 120 species, has se ...
... quantiWed (Hoy 1992). Since the Miocene bats have become a signiWcant predation risk and can be considered as a major force in shaping acoustic behaviour in tettigoniids (Hoy 1992; Yager 1999; Lehmann 2003; Fullard et al. 2004). The ensiferan genus Poecilimon, including more than 120 species, has se ...
Germinable seeds
... Contrary to expectations, predator exclosures had no effect on the subsequent year’s germinable seedbank, this despite a more intensive sampling protocol as used in the 2007-2008 experiment where large predation losses were documented. ...
... Contrary to expectations, predator exclosures had no effect on the subsequent year’s germinable seedbank, this despite a more intensive sampling protocol as used in the 2007-2008 experiment where large predation losses were documented. ...
Interspecific Competition in Plants: How Well Do Current Methods
... three questions relevant to describing competitive interactions: Which species dominates? Which species gains? and How do species affect each other? The choice of experimental design and measurements greatly influences the scope of inference permitted. Conditions under which the latter two questions ...
... three questions relevant to describing competitive interactions: Which species dominates? Which species gains? and How do species affect each other? The choice of experimental design and measurements greatly influences the scope of inference permitted. Conditions under which the latter two questions ...
Protected species - The Woodland Trust
... trees; gradually creating space and increasing light levels around the trees to ensure their survival. In 2006, a survey by Frank Greenway failed to record the Bechstein’s bats he sought, but it did catch a number of barbastelle bats. In 2007/8 a barbastelles in the landscape project was funded by S ...
... trees; gradually creating space and increasing light levels around the trees to ensure their survival. In 2006, a survey by Frank Greenway failed to record the Bechstein’s bats he sought, but it did catch a number of barbastelle bats. In 2007/8 a barbastelles in the landscape project was funded by S ...
Biological and ecological traits of marine species
... based on taxonomic and functional traits, can predict invasiveness in communities. We propose that the traits that users need should be prioritised for inclusion in databases. Ideally, this should result in users publishing new analyses resulting from the inclusion of traits in the database, which i ...
... based on taxonomic and functional traits, can predict invasiveness in communities. We propose that the traits that users need should be prioritised for inclusion in databases. Ideally, this should result in users publishing new analyses resulting from the inclusion of traits in the database, which i ...
MECHANISMS OF MAINTENANCE OF SPECIES DIVERSITY Peter
... extinction rates, and infrequent colonizations (35, 74). The primary concern of this review is with diversity maintenance as species coexistence. Many models of species coexistence are thought of as models of coexistence in some defined local area. However, to make any sense, the area addressed must ...
... extinction rates, and infrequent colonizations (35, 74). The primary concern of this review is with diversity maintenance as species coexistence. Many models of species coexistence are thought of as models of coexistence in some defined local area. However, to make any sense, the area addressed must ...
Apparent competition with an invasive plant hastens the extinction of
... Abstract. Invasive plants may compete with native plants by increasing the pressure of native consumers, a mechanism known as ‘‘apparent competition.’’ Apparent competition can be as strong as or stronger than direct competition, but the role of apparent competition has rarely been examined in biolo ...
... Abstract. Invasive plants may compete with native plants by increasing the pressure of native consumers, a mechanism known as ‘‘apparent competition.’’ Apparent competition can be as strong as or stronger than direct competition, but the role of apparent competition has rarely been examined in biolo ...
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.