Species

  • Douglas-fir Featured Article Douglas-fir Douglas-fir

    The Douglas-fir (scientific name: Pseudotsuga) is a genus of tree that includes ar least five species found in North America and Asia: Scientific... More »

  • European otter Featured Article European otter European otter

    The European otter (Lutra lutra) is a broadly distributed marine mammal found in both marine and freshwater systems over considerable portions of Europe, Asia and North Africa;... More »

  • Scaptia beyonceae: new species of fly Featured News Article Scaptia beyonceae: new species of fly Scaptia beyonceae: new species of fly

    A previously un-named species of horse fly whose appearance is dominated by its glamorous golden lower abdomen has been named in honour of American pop diva,... More »

  • Welwitschia Featured Article Welwitschia Welwitschia

    The Welwitschia (Welwitschia mirabilis) is a gymnosperm relict plant endemic to the Namib Desert. The species aerial architecture consists of a pair of very wide curled and... More »

  • Dugongs in Malaysia Featured Article Dugongs in Malaysia Dugongs in Malaysia

    Overview Dugongs were once common throughout the shallow coastal waters of East Malaysia (northeast Borneo).  The hunting of dugongs, particularly off the... More »

  • Crustacea Featured Article Crustacea Crustacea

    Crustaceans are invertebrates belonging to the phylum Arthropoda and include such familiar groups as barnacles, crabs, crayfish, lobster, water fleas and pill bugs. Crustaceans... More »

  • Macaroni penguin Featured Article Macaroni penguin Macaroni penguin

    The Macaroni penguin (scientific name: Eudyptes chrysolophus) is is one of seventeen species of flightless birds in the family of penguins. It is one of six "Crested... More »

  • Banded butterflyfish Featured Article Banded butterflyfish Banded butterflyfish

    The Banded butterflyfish (Chaetodon striatus) is a member of the butterflyfish family (Family Chaetodontidae) that lives on coral reefs in the Western Atlantic Ocean and... More »

Recently Updated
Biogeography Last Updated on 2014-11-30 22:10:52 Biogeography is the study of the spatial distribution of biological organisms. The scale of analysis ranges from very small micro-topography regimes to continental dimensions. Fundamental concepts in this field of study are the nature of barrier formation and response of species in their patterns of travel and migration; in particular, the presence of rivers, mountain ranges, deserts and other natural boundaries are examples of large scale barriers. Besides such major landform barriers, there are soil, topographic and meteorological factors that influence the distribution of each species. In the case of smaller scale regimes that are applicable for some bacteria or limited range plant species, there are often very restricted niches; for example, certain bacteria extremophiles may be limited to such localized features as small geyser pools, and some rare plants may have a single extant... More »
Species range limits Last Updated on 2014-11-09 18:49:44 Species range limits (SRLs) are defined as the spatial boundaries beyond which no living individuals of a given species occur.  Populations occurring near or at SRLs are often referred to as “marginal,” “peripheral,” “edge,” or “border” populations.  SRLs may represent areas beyond which individuals cannot physiologically tolerate ecological conditions or areas where they have not yet dispersed.  SRLs may be stable (i.e., at equilibrium) or may represent areas where range expansion through migration or population growth is in the process of occurring.  SRLs are significant to ecology, evolution, and conservation for several reasons.  They provide opportunities to understand the conditions under which populations expand or contract, and the conditions under which populations may evolve new forms. Additionally, SRLs... More »
Umbrella species Last Updated on 2014-11-09 18:40:24   The concept of an umbrella species has been used by conservation practitioners to provide protection for other species using the same habitat as the umbrella species.  As the term implies, a species casts an “umbrella” over the other species by being more or equally sensitive to habitat changes. Thus monitoring this one species and managing for its continued success results in the maintenance of high quality habitat for the other species in the area.  Animals identified as umbrella species typically have large home ranges that cover multiple habitat types.  Therefore, protecting the umbrella species effectively protects many habitat types and the many species that depend on those habitats. Although the effectiveness of this conservation approach is debated, it is often used by practitioners to select a minimum size for protected... More »
Plant Last Updated on 2014-10-28 12:04:37 A plant is any one of the vast number of organisms within the biological kingdom Plantae; in general, these species are considered of limited motility and generally manufacture their own food. They include a host of familiar organisms including trees, forbs, shrubs, grasses, vines, ferns, and mosses. Conventionally the term plant implies a taxon with characteristics of multicellularity, cell structure with walls containing cellulose, and organisms capable of photosynthesis. Modern classification schemes are driven by somewhat rigid categorizations inherent in DNA and common ancestry.[1] Throughout most of the history of science from Aristotle to Linnaeus and into the 20th century, species were divided into two kingdoms: animals and plants. Driven by DNA characterizations and other modern analysis, fungi and bacteria have now been removed to separate kingdoms; in particular,... More »
Angiosperm Last Updated on 2014-10-28 11:28:09 The Angiosperms, or flowering plants, described taxonomically as the division Magnoliophyta, are the largest grouping within the plant kingdom (Kingdom ''Plantae'' or "Viridiplantae") in terms of the numbers of described species.  Approximately 260,000 species of flowering plant have been named so far -- constituting nearly 90% of all known species of plants. Even so, taxonomists describe many new species annually, and estimates of total angiosperm diversity reach as high as 400,000 species.  There are about 450 families of flowering plants, and they display extremely diverse life-histories and ecological adaptations.  In addition to dominating plant biodiversity, angiosperms are the dominant photosynthesis/photosynthetic organisms (primary producers) in most terrestrial ecosystems (an important exception to this rule are the boreal forests,... More »