Do herbivores cause habitat degradation or vegetation state transition? Evidence from the tundra

Article Abstract:

Herbivore-driven ecosystem, which changes frequently representing predictable transitions from one vegetation state to another, is described. The concept of alternative stable states to arctic tundra is applied as a framework to capture predictable stepwise vegetation transitions in which the productivity and hence, herbivore-carrying capacity increases with grazing pressure in order to explore herbivore-driven habitat degradation.

Plant communities, Herbivores, Tundra ecology

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Consequences of prolonged clonal growth on local and regional genetic structure and fruiting success of the forest perennial Maianthemum bifolium

Article Abstract:

A study of the effects of prolonged clonal growth and very low rates of sexual recruitment on the genetic structure of the perennial Maianthemum bifolium, an outcrossing understorey species of temperate forests is illustrated. The results show that prolonged clonal growth and lack of sexual recruitment may affect within- and between- population genetic structure and the capability for sexual reproduction.

Belgium, Sexual behavior, Genetic aspects, Biological diversity, Biodiversity, Pollination, Lilies-of-the-valley, Lily of the valley

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