潮間帶灘底鳥類棲息與底棲生物之關係

Relationships between Bird Foraging and Benthic Communities on Intertidal Flats

余倖霈(Sing-Pei Yu) ； 林幸助(Hsing-Juh Lin)

《濕地學刊》 4卷1期 (2015/12) Pp. 65-80

摘要

彰化濱海有許多保育種鳥類棲息，但在芳苑濕地竟有一處無水鳥棲息覓食的灘地。於是本研究於2014年7月到2015年3月間在芳苑濕地兩處灘地進行調查，分別在無水鳥與有水鳥棲息的潮間帶灘地，每3個月採一次樣，量化底棲動物和底棲藻類生物量，並探討影響底棲動物和底棲藻類之因子。結果顯示，有鳥區雙殼類生物量及豐度皆顯著高於無鳥區，而底棲藻類生物量也有相同結果。相關分析結果顯示，磷酸鹽、銨鹽和底棲藻類生物量有正相關。推測可能是因為有鳥區營養豐富，底棲藻類生物量較多，進而提升雙殼類生物量及豐度，較能吸引鳥類棲息。

關鍵字

底棲動物 ； 雙殼類 ； 底棲藻類 ； 營養豐富 ； 鳥類覓食

並列摘要

Changhua coast is an area where a large number of protected birds are distributed. However, we observed some intertidal flats without bird foraging in the Fangyuan wetland. In order to quantify the spatio-temporal dynamics of zoobenthos and benthic algal biomass in the wetland, sampling was conducted at two nearby sites for comparisons every three months from 2014 to 2015. Results showed that biomass and abundance of bivalves at the site with bird foraging was significant higher than the site without bird foraging, so was the biomass of benthic algae. There is a positive correlation between dissolved inorganic phosphate, ammonium, and benthic algal biomass. We suggest that the possible reason for bird foraging is nutrient enrichment increasing benthic algal biomass and providing food supply for bivalves, which in turn increasing the biomass and abundance of bivalves, and attracting more birds to feed.

並列關鍵字

benthic fauna ； bivalves ； benthic algae ； nutrient enrichment ； bird foraging