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| Lepofsky, Dana; Simon Fraser University; dlepofsk@sfu.ca; Heyerdahl, Emily K; USDA Forest Service; eheyerdahl@fs.fed.us; Lertzman, Ken; Simon Fraser University; lertzman@sfu.ca; Mierendorf, Bob; North Cascades National Park Service Complex; Bob_Mierendorf@nps.gov. |
| The recent encroachment of woody species threatening many western North American meadows has been attributed to diverse factors. We used a suite of methods in Chittenden Meadow, southwestern British Columbia, Canada, to identify the human, ecological, and physical factors responsible for its historical dynamics and current encroachment by woody vegetation. We evaluated three hypotheses about the origin and processes maintaining the meadow: the meadow is (1) of recent human origin; (2) of ancient human origin, maintained by aboriginal burning; and (3) of ancient non-human origin, not maintained by aboriginal burning. Our data supported the idea that the meadow had ancient non-human origins and its recent history and current status have resulted from... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Anthropogenic influence; Archaeology; British Columbia; Cascade Range; Chittenden Meadow; Climate change; Dendrochronology; Fire suppression; Historical dynamics; Meadows; Ponderosa pine; Tree encroachment. |
| Ano: 2003 |
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| Kenne,Diego Costa; Araujo,Paula Beatriz. |
| ABSTRACT Balloniscus glaber Araujo & Zardo, 1995 (Balloniscidae), a Neotropical Oniscidea, has been recorded historically in environments with low or no human interference. In one of these areas, it was determined as aK-strategist. Recently, however, this species was documented in a disturbed forest within urban limits. The present work revealed that the population in the urban area has high density, high number of ovigerous females and mancae in the population, a long reproductive period, and early sexual maturity. These results suggest that modified environments may provide favorable conditions and that the species is not negatively affected by human influence. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Human interference; Anthropogenic influence; Population ecology; K-strategist; Terrestrial isopods. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000400430 |
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