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1. research.fs.usda.gov › treesearch › downloadSpecies rarity: definition, causes, and classification

   research.fs.usda.gov › treesearch › download

   We address these questions so as to provide a foundation for why resource managers need to be concerned about rare species and how they can identify them. We also discuss the implications that various causes of rarity have on the choice, and likely success, of management actions to protect and enhance populations of rare species. Chapter 3.

2. pubs.cif-ifc.org › doi › pdfUnderstanding rarity: A review of recent conceptual advances ...

   pubs.cif-ifc.org › doi › pdf

   Rare species carry a connotation of uniqueness, of being especially valuable, and of heightened extinction risk. We review the literature regarding rare species and link rarity and risk concepts to jurisdictional rarity and how to allocate conser-vation efforts to rare species gone long undetected.

3. www.researchgate.net › publication › 236965289(PDF) Species rarity: definition, causes, and classification

   www.researchgate.net › publication › 236965289

   Jan 1, 2007 · Here we summarize studies, most employing alternative methodological strategies, wherein less common and rare species are demonstrated to make significant contributions to ecosystem functioning.

4. www.researchgate.net › publication › 377408324_How(PDF) How and why species are rare: towards an understanding ...

   www.researchgate.net › publication › 377408324_How

   Jan 15, 2024 · We propose a modification of Rabinowitz's typology to better distinguish between the dimensions of rarity and the ecological processes that drive them, and explore the conservation...

5. www.semanticscholar.org › paper › How-and-why-species[PDF] How and why species are rare: towards an understanding ...

   www.semanticscholar.org › paper › How-and-why-species

   Jan 15, 2024 · We propose a modification of Rabinowitz's typology to better distinguish between the dimensions of rarity and the ecological processes that drive them, and explore the conservation implications of our modified framework.

6. www.researchgate.net › publication › 259799534_What(PDF) What Are Rare Species and Why Conserve Them? - ResearchGate

   www.researchgate.net › publication › 259799534_What

   Jan 1, 2000 · What Are Rare Species and Why Conserve Them? This paper considers the concept of rarity in bryophytes from two inter-related viewpoints: 1) distribution and abundance, and 2) a complex of...

7. People also ask

   How do we classify rare species?

   • A number of strategies for classifying rare species have been proposed, with most using information on the cur rent status or trends in the distribution and abundance of a species either to determine if a species qualifies as rare or to categorize the species into a rarity type.

   Species rarity: definition, causes, and classification

   research.fs.usda.gov/treesearch/download/32788.pdf

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   What is species rarity?

   • Species Rarity: Definition, Causes, and Classification or extinction; 4, apparently secure; and 5, demonstrably widespread, abun dant, and secure. A species that is critically imperiled on a rangewide basis would be ranked as G1, whereas a species ranked as Sl would be critically imperiled in a particular state, regardless of its status elsewhere.

   Species rarity: definition, causes, and classification

   research.fs.usda.gov/treesearch/download/32788.pdf

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   What makes a species rare?

   • Rarity is most often defined by two attributes: a species' distribution and its abundance. Species are considered rare if their area of occupancy or their numbers are small when compared to the other species that are taxonomi cally or ecologically comparable.

   Species rarity: definition, causes, and classification

   research.fs.usda.gov/treesearch/download/32788.pdf

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   What does rarity mean in conservation biology?

   • The concept of rarity has several definitions in common usage, but in the lexicon of conservation biology a species' rarity is most simply based on its distribution and abundance (Gaston 1994).

   Species rarity: definition, causes, and classification

   research.fs.usda.gov/treesearch/download/32788.pdf

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   How many types of rare species are there?

   • This leads to eight classes: one abundant class, where a species has a wide geographic range, is abundant in some places, and has broad habitat requirements; and seven different forms of rarity. A number of classification strategies have been proposed to assign con servation priorities to rare species.

   Species rarity: definition, causes, and classification

   research.fs.usda.gov/treesearch/download/32788.pdf

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   Do rare species differ from all species?

   • No other values for rare species are significantly different from values for all species (p >0.05). gered. Watkinson (1981) noted that weeds of arable plants in the British flora. Orb?n (1992) analysed the

   (PDF) What Are Rare Species and Why Conserve Them? - ResearchGate

   www.researchgate.net/publication/259799534_What_Are_Rare_Species_and_Why_Conserve_Them

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8. www.semanticscholar.org › paper › Species-raritySpecies rarity: definition, causes, and classification

   www.semanticscholar.org › paper › Species-rarity

   A foundation for why resource managers need to be concerned about rare species and how they can identify them is provided and the implications that various causes of rarity have on the choice, and likely success, of management actions to protect and enhance populations of rare species are discussed.