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| De Montaudouin, X.; Lanceleur, L.. |
| We studied the spatial heterogeneity of infection of the marine bivalve Cerastoderma edule (cockle) by trematode parasites at 5 different scales in Banc d'Arguin, France. At the km-scale, the communities of trematodes differed among stations in terms of species composition and specific abundance. Infection heterogeneity was likely due to the occurrence of the definitive host and the conditions of transmission (water parameters). At the 100 m scale, trematode species richness was similar among stations, but specific trematode abundances differed. The most significant variable in terms of explaining trematode infection heterogeneity was the presence of the first intermediate host. At the 10 m scale, the distance at which parasite abundance diminished varied... |
| Tipo: Text |
Palavras-chave: Spatial heterogeneity; Aggregation pattern; Parasitism; Cerastoderma edule; Sampling scale. |
| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00375/48647/49047.pdf |
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| Pimentel,Marina C.P.; Barros,Marx J.; Cirne,Paulo; Mattos,Eduardo A. de; Oliveira,Rodrigo C.; Pereira,Miriam C.A.; Scarano,Fabio R.; Zaluar,Henrique L.T.; Araujo,Dorothy S.D.. |
| We examined large-scale spatial variation of structural parameters and floristic composition in open Clusia scrub, a vegetation type of the Brazilian "restingas" (sandy coastal plain vegetation). This vegetation is organized in islands separated by sandy stretches with sparse herbaceous vegetation. We located 12 sample areas on three consecutive beach ridges, lying parallel to the coastline and at different distances from the ocean, in close proximity to two lagoons (Cabiúnas and Comprida). Each sample area was divided into three strips. We used the line intercept method to sample all woody plants ³ 50 cm tall. We used nested ANOVA to verify structural variation between different sampling scales. TWINSPAN analysis was performed to examine the variation in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phytosociology; Plant community; Sampling scale; Sandy coastal plain. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000300018 |
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