Rapid Growth of Snag-Dwelling Chironomids in a Blackwater River: The Influence of Temperature and Discharge
Rapid Growth of Snag-Dwelling Chironomids in a Blackwater River: The Influence of Temperature and Discharge
复制标题
黑水河中摇蚊的快速生长：温度和流量的影响
DOI：
10.2307/1467575
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发表时间：
1991
影响因子：
--
通讯作者：
A. Benke
中科院分区：
文献类型：
--
作者：
F. Hauer;A. Benke
在乔治亚州海岸平原的黑水河流Ogeechee河岸，在模拟自然条件的试验室中，测量了摇尾虫幼虫全年的生长速度。在实验室或野外研究中，Chironomini、Tanytarsini和Orthocladiinae的平均生长速率分别为0.60、0.43和0.44 mg-1 d-1。Chironomini、Tanytarsini和总chironomides科的生长与温度的关系用二阶多项式曲线最能描述。大多数曲线显示在4-7°C有x轴截距（零增长），在21-24°C有最大增长。当河流流量远低于平均值时，生长速率显著降低，生长与温度的关系不再显著。将生长方程应用于自然环境条件，预测春季和秋季的最大生长，年增长率（年P/B比的近似值）从Chironomini的222到Tanytarsini的182。预测的生长速率在所有季节都很高，这表明摇尾虫在无脊椎动物群落中的生物能量作用远远大于仅根据其常绿生物量所能假设的作用。
Growth rates were measured for chironomid larvae throughout the year in chambers simulating natural conditions at a field site on the bank of the Ogeechee River, a blackwater river in the Georgia Coastal Plain. Growth rates were among the highest ever reported for chironomids in laboratory or field studies, averaging 0.60, 0.43, and 0.44 mg mg-1 d-1 for Chironomini, Tanytarsini, and Orthocladiinae, respectively. The relationship of growth with temperature was best described with second-order polynomial curves for Chironomini, Tanytarsini, and total Chironomidae. Most curves suggest an x-axis intercept (zero growth) at 4-7°C and a growth maximum at 21-24°C. Growth rates were significantly lower and the relationship of growth with temperature was no longer significant when river discharge was well below the mean. Growth equations were applied to natural environmental conditions, predicting maximum growth during spring and fall, with an annual growth rate (an approximation of annual P/B ratio) ranging from 222 for Chironomini to 182 for Tanytarsini. Predicted growth rates were high throughout all seasons, indicating that the bioenergetic role of chironomids in invertebrate communities is substantially greater than can be assumed based on their standing stock biomass alone.