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Titolo:
The potential impact of small-scale physical disturbance on seedlings in apapuan rainforest
Autore:
Mack, AL;
Indirizzi:
Conservat Int, Washington, DC 20037 USA Conservat Int Washington DC USA 20037 ervat Int, Washington, DC 20037 USA
Titolo Testata:
BIOTROPICA
fascicolo: 4, volume: 30, anno: 1998,
pagine: 547 - 552
SICI:
0006-3606(199812)30:4<547:TPIOSP>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEOTROPICAL RAIN-FOREST; SEED DISPERSAL; DIPTERYX-PANAMENSIS; TREE; RECRUITMENT; MORTALITY; CASUARIUS; SURVIVAL; DISTANCE;
Keywords:
artificial seedlings; disturbance; ground slope litterfall; mortality; Papua New Guinea; rain forest; seedling;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Mack, AL POB 15, Weikert, PA 17885 USA POB 15 Weikert PA USA 17885POB 15, Weikert, PA 17885 USA
Citazione:
A.L. Mack, "The potential impact of small-scale physical disturbance on seedlings in apapuan rainforest", BIOTROPICA, 30(4), 1998, pp. 547-552

Abstract

Physical disturbance, such as falling debris, is an important cause of mortality to rain forest seedlings. I used artificial seedlings to quantify physical disturbance in a rain forest at the Crater Mountain Biological Research Station in Papua New Guinea. Single (N = 418) and clustered artificial seedlings (N = 428) were placed on eight transects spanning varied topography to assess the area's disturbance regime, to test if ground slope affected disturbance, and to test if clustering affected the incidence of damage. Two transects showed a significant departure from random in the spatial distribution of damaged seedlings within the transect, suggesting chat some areas of experience more disturbance than others. Artificial seedlings on level ground experienced damage less often than artificial seedlings on slopes; disturbance increased with ground slope. Artificial seedlings in dry washes experienced the greatest probability of damage. Artificial seedlings inclusters experienced significantly less damage than single ones, suggesting clustered seedlings might be less vulnerable to damage than lone seedlings. The disturbance rate at this sire (34.7% damaged in one year) was markedly lower than that measured at the La Selva Biological Reserve in Costa Rica (82.4%).

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Documento generato il 04/12/20 alle ore 02:45:16