本研究從1995年1月到1996年4月，分析位於台北縣坪林鄉的金瓜寮溪
以及宜蘭縣員山鄉 與台北縣烏來鄉交界處的哈盆溪之四個溪流樣區中蛙
類的群聚，由微棲地、時間及食物三個 方向來探討共域蛙種間資源分配
利用，環境因子對不同蛙種資源分配的影響，另外也分析族 群隨著季節
演變的情形。

研究中發現的蛙類共有12種，其中有盤谷蟾蜍(Bufo bankroensis)、褐樹
蛙(Buergeria robustus)、日本樹蛙(Buergeria japonicus)、面天樹蛙(
Chirixalus idiootocus)、台北樹蛙(Rachophorus taipeianus)、古氏赤
蛙(Rana kuhlii)、梭德赤蛙(Rana sauteri)、斯文豪赤蛙(Rana narina
swinhoana)、拉都希赤蛙(Rana latouchi)、澤蛙(Ranalimnocharis
limnocharis)、腹斑蛙(Rana adenopleura)、貢德赤蛙(Rana guentheri)
等； 兩條溪流因為底石組成、遮蔽度及周圍環境的不同，而造成物種組
成不同的現象。在樣區中 的不同種的蛙類，會因為對水陸域的偏好而分
成水域及陸域型，根據生態棲位寬度及生態棲 位重疊度的結果，金瓜寮
溪下游站的褐樹蛙在棲地的利用上，有最大的生態棲位寬度 0.4)，(0.4)
，金瓜寮溪上游站的盤谷蟾蜍在時間上，有最大的生態棲位寬度(0.45)，
食性方面以金瓜寮溪的褐樹蛙最大(0.24)；在生態棲位重疊度方面，以哈
盆溪新竹區站的腹斑蛙與拉都 希赤蛙間，在棲地的利用方面最大(0.95)
，時間方面是哈盆溪西洋菜站的盤谷蟾蜍和斯文豪 赤蛙間最大(0.84)，
食性方面以金瓜寮溪的梭德赤蛙和褐樹蛙間最大(0.87)。
青蛙彼此間因為種間競爭、生理限制及捕食者效應而進行資源分配，蛙種
節的變化，而有族群變動的現象，資料顯示，褐樹蛙主要出現在春、夏兩
季，至於冬季在溪 流中活動的蛙類個體則很少，主要是盤古蟾蜍和梭德
赤蛙。對於微棲地的利用，也有明顯的 不同，例如褐樹蛙偏好陸域、直
徑大於25.6cm石頭的凸面或平面等，而古氏赤蛙則偏好水域、距離水陸交
界處25公分內、的凹面或平面，對於棲地中其他環境資源的利用亦有所不
同。

This study was conducted from January 1995 to April 1996,
at Jin-Gua-Liao creek of Taipei County and Ha-Pan Stream of I-
Lan County. The main purpose ofthis research was investigated
the resource partitioning among sympatric frogsof two
communities in streams. We also monitored the species and
populationsuccession in each community.

During the research period, we discovered twelve species of
frog, including Bufo bankorensis, Buergeria robustus, Buergeria
japonicus, Chirixalus diootocus,idiootocus, Rhachophorus
taipeianus, Rana kuhlii, Rana sauteri, Rana narinaswinhoana,
Rana latouchi, Rana limnocharis, Rana adenopleura and Rana
guentheri. The bed rocks, canopy coverage and other
environmental factors will affect thespecies composition of the
community. Frogs in streams can be separated intotwo groups, i.
e., lotic group and terrestrial one, base on their
habitatpreferences. Results of niche breath and niche overlap
showed that Buergeriarobustus in the downstream site of Jin-Gua-
Liao creek has the widest niche of habitat usage (0.4). Bufo
bankorensis in the upstream of Jin-Gua-Liao creek has the
widest niche in temporal aspect (0.45). Buergeria robustus in
theJin-Gua-Liao creek has the widest niche on food (0.24). The
greatest nicheoverlap was seen between Rana latouchi and Rana
adenopleura of Ha-Pan stream in habitat usage (0.95). Bufo
bankorensis and Rana narina swinhoana has thegreatest niche
overlap in temporal aspect (0.84). The greatest niche overlap
was seen between Rana sauteri and Buergeria robustus of Jin-
Gua-Liao creek in diet (0.87).

The data showed that the species of frogs in the stream varies
with seasons. Buergeria robustus primarily appeared in spring
and summer. Bufo bankorensis and Rana sauteri were rarely seen
in steams during the winter.
This study was conducted from January 1995 to April 1996,