... from the beaver dam include Warnstorfia spp. and Drepanocladus aduncus, suggesting shallow,
stagnant, or slow-moving water. The presence of Najas flexilis, Typha latifolia, and modern
beaver (Castor canadensis) suggest that central Alaska had a warmer climate during the early
Skelly, D. K. ...
An Exploration of Conservation Breeding and
... For over a decade I have had the privilege of leading the Calgary Zoo as we strive to achieve our vision of
becoming Canada’s leader in wildlife conservation. Over this time, our Conservation Research team has
diligently used science to conserve and recover Canadian species at risk, including the sw ...
Seagrass Literature Review - Department of Environment, Land
... Port Phillip Bay. Halophila australis, Posidonia australis and Lepilaena marina have been the
subject of limited research in Victoria.
Seagrass distribution and structure varies across spatial and temporal scales and among species.
Victorian seagrass distributions have typically been mapped using gr ...
A Strategy for Preserving Native Biodiversity in the Santa Cruz
... endemic and locally unique plants and animals in the sandhills are also very rare and the two
sandhills plant communities— maritime coast range ponderosa pine forest and northern maritime
chaparral— are listed as sensitive communities in the California Natural Diversity Database.
Ongoing habitat con ...
Chiricahua Leopard Frog Recovery Plan
... moderate pH, and may be excluded or exhibit periodic die-offs where a pathogenic
chytridiomycete fungus is present. Threats to this species include predation by non-native
organisms, especially American bullfrogs, fish, and crayfish; the fungal disease
chytridiomycosis; drought; floods; degradation ...
Atlantic Salmon Salmo salar
... This species requires rivers or streams that are generally clear, cool and well-oxygenated for reproduction and the
first few years of rearing, but undertakes lengthy feeding migrations in the North Atlantic Ocean as older juveniles and
adults. This population breeds in rivers from the southeast tip ...
Lynx lynx TO SCOTLAND - Highland Foundation for Wildlife
... world in recent decades. However, the UK has not yet reintroduced any nationally extinct
mammal species. One of these missing species, the Eurasian lynx, has recently been
reintroduced to several European countries. This study investigates the feasibility of
reintroducing the Eurasian lynx to Scotla ...
oribi antelope - Conservation Breeding Specialist Group
... towards Ethiopia and southwards towards South Africa, it is patchily and discontinuously
distributed within this area as a result of specific habitat requirements (Adamczak, 1999). In
South Africa, Oribi are distributed within Mpumalanga, Gauteng, the North West, Free State,
KwaZulu-Natal and the Ea ...
The potential for reintroduction of Eurasian lynx to Great Britain: a
... over sheep predation is low except in Norway and to a lesser extent the Alps and Jura,
where husbandry practices predispose livestock to high predation rates.
11. Vehicle-collisions are another significant cause of lynx mortality and limit recolonisation
in the fragmented habitats of central Europe. ...
Review of - Kangaroos at risk
... statement, however nothing is provided by Walters (2010) to this effect.
No such justification is provided, nor even a baseline assessment, which could provide for conclusions
that there are any degraded natural vegetation values at the site, much less is evidence provided
demonstrating that impacte ...
NRCS Action Plan to Conserve: Identified Priority Fish and Wildlife
... III. State Fish and Wildlife Priorities
A Comprehensive Wildlife Conservation Strategy (CWCS) for Maine has been developed by the
Maine Department of Inland Fisheries and Wildlife (MDIFW), Maine Department of Marine
Resources (MDMR) and their partners (MDIFW 2005) to satisfy requirements of the Stat ...
The Functional Value of Caribbean Coral Reef
... (1997a) to categorise available literature and assess the ‘‘functional value’’ of
Caribbean marine habitats. Functional value indicates the importance of a
particular habitat to a particular process. For example, we document that a
seagrass bed has a higher (more important) functional contribution t ...
Western Quail Plan-111009
... shrublands of northwestern United States to
the deserts of the Southwest. Throughout
the ranges of the various species, quail
abundance is a product of habitat availability
and quality, and by extension, patterns and
timing of rainfall. Habitat conditions and
population densities were based on avail ...
DISTRIBUTION AND ECOLOGY OF LOWLAND PINE MARTEN
... suggested that pine marten higher competitive ability with respect to the stone marten could be
the indirect consequence of its greater plasticity in activity patterns. As different guild
compositions result into different interspecific relations among coexisting species, our findings
need to be fur ...
Recovery Plan for the Canada Lynx
... genetically isolated if animals cannot emigrate from the continental population.
Preliminary results from a study on the molecular genetics of Cape Breton lynx
suggested that such isolation has not yet occurred. Changes to the forested landscape
and access brought about by forest management and road ...
Recovery Strategy for the Boreal Caribou in the NWT (2017)
... Columbia to the south, although boreal caribou there are considered different populations for
management purposes. NWT‟s population (called NT1) also extends slightly into northeastern
Yukon. Boreal caribou are naturally found at low densities, either individually or in small
groups. They do not for ...
INTRODUCTION - Wild Utah Project
... (Rana luteiventris), and several species of mollusks. Populations of these species,
however, are rare and in some areas declining. The rapid deterioration of these aquatic
environments, primarily from water development and/or agricultural practices, has
caused other unique Bonneville Basin species, ...
Juvenile Pacific Salmon in Puget Sound
... attributes and the context of that habitat within the bigger
picture of its surrounding larger ecological systems (referred
to as landscape attributes); landscape attributes include the
arrangement of habitats, habitat shape, location and connectivity. The ability of nearshore habitats to support sa ...
Research Information Needs
... viability of native fish in the CRE? What is an acceptable probability of extinction over what
management time period for HBC throughout the CRE?
RIN 2.2.2 - Determine if a population dynamics model can effectively predict response of native
fish under different flow regimes and environmental condit ...
Chapter 6 ― Limiting Factors and Threats to Recovery
... access should be considered a problem. If off-channel habitat to which access has been
eliminated is in impaired condition, it also is considered an element of the physical habitat
quality/quantity limiting factor.
Population traits – Impaired population condition(s) including: genetic, life history ...
Assessment of Canada Lynx Research and
... ABSTRACT The ecology of Canada lynx (Lynx canadensis) and their main prey, snowshoe hares (Lepus americanus), is poorly understood in
southern Canada and the contiguous United States compared to the boreal forest of Canada and Alaska, USA, where both species are well
studied. However, given recent l ...
Source–sink dynamics is a theoretical model used by ecologists to describe how variation in habitat quality may affect the population growth or decline of organisms.Since quality is likely to vary among patches of habitat, it is important to consider how a low quality patch might affect a population. In this model, organisms occupy two patches of habitat. One patch, the source, is a high quality habitat that on average allows the population to increase. The second patch, the sink, is very low quality habitat that, on its own, would not be able to support a population. However, if the excess of individuals produced in the source frequently moves to the sink, the sink population can persist indefinitely. Organisms are generally assumed to be able to distinguish between high and low quality habitat, and to prefer high quality habitat. However, ecological trap theory describes the reasons why organisms may actually prefer sink patches over source patches. Finally, the source-sink model implies that some habitat patches may be more important to the long-term survival of the population, and considering the presence of source-sink dynamics will help inform conservation decisions.