Spatial variation in litter production by the mangroveAvicennia marinavar.australasicain Rangaunu harbour, Northland, New Zealand
作者:
JonathanD. May,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1999)
卷期:
Volume 33,
issue 2
页码: 163-172
ISSN:0028-8330
年代: 1999
DOI:10.1080/00288330.1999.9516866
出版商: Taylor & Francis Group
关键词: mangrove swamps;productivity;organic matter;detritus;Avicennia marinavar.australasica;New Zealand
数据来源: Taylor
摘要:
Litter fall was measured at two intertidal levels within two stands of the mangroveAvicennia marina(Forsk.) Vierh. var.australasica(Walp.) Moldenke in Rangaunu Harbour, New Zealand (34° 57'S, 173° 15'E). The seasonal pattern of litter fall was typical ofA. marinaat high latitudes. Flowering occurred in March‐April and fruit fell 9 months later during December‐January. Leaf fall was highest from November to February and was positively correlated with temperature and negatively correlated with sediment water availability (total rainfall minus total evaporation). Total annual litter fall ranged from 1.81 ha‐1yr‐1to 6.21 ha‐1yH and was proportional to mean tree height at each site. Leaves constituted on average 73% of the total litter fall and were the only litter component to show significantly lower magnitude at both elevated sites. The largest litter collections were made during the summer months coincident with peak falls of leaves and fruit. The possible contribution of mangrove litter to es‐tuarine food chains in northern New Zealand estuaries is discussed.
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