Fine-scale variation in microhabitat conditions influences physiology and metabolism in an Antarctic insect

Fine-scale variation in microhabitat conditions influences physiology and metabolism in an Antarctic insect
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微生境条件的精细变化影响南极昆虫的生理和新陈代谢

DOI:
10.1007/s00442-021-05035-1
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发表时间:
2021
期刊:
影响因子:
2.7
通讯作者:
Teets, Nicholas M.
Teets, Nicholas M.
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Spacht, Drew E.;Gantz, J. D.;Devlin, Jack J.;McCabe, Eleanor A.;Lee, Richard E.;Denlinger, David L.;Teets, Nicholas M.

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景观中存在着具有不同生物和非生物特性的微生境,这种微生境的变化会对占据其中的生物的物候和生理产生巨大影响。南极蠓(belgica antarcantarctica)生活在南极半岛西部不同的微生境中,这些微生境在大型植物组成、水质、营养输入和热模式上各不相同。在这里,我们比较了五个种群的季节性生理变化。生活在南极洲帕尔默站附近的近距离但不同的微栖息地。在我们的样品位置之间的热状态在平均温度和热稳定性方面都有所不同。在最暖点和最冷点之间,季节平均气温相差2.6℃,冰点以上日数相差1.7℃。不同地点的幼虫代谢和生长速率不同,成虫羽化发生的时间也不同。不同的微生境也对应着不同的体组成,如不同部位幼虫的脂质和碳水化合物含量不同。此外,碳水化合物和蛋白质含量的季节变化取决于地点,这表明幼虫在准备过冬时生化成分的细微变化。总之,这些结果表明,微生境特性的变化影响了近距离生活的蠓种群的个体发育、物候、生理和生化组成。这些结果对预测南极生态系统对环境变化的响应具有重要意义。
Microhabitats with distinct biotic and abiotic properties exist within landscapes, and this microhabitat variation can have dramatic impacts on the phenology and physiology of the organisms occupying them. The Antarctic midgeBelgica antarcticainhabits diverse microhabitats along the Western Antarctic Peninsula that vary in macrophyte composition, hygric qualities, nutrient input, and thermal patterns. Here, we compare seasonal physiological changes in five populations ofB. antarcticaliving in close proximity but in different microhabitats in the vicinity of Palmer Station, Antarctica. Thermal regimes among our sample locations differed in both mean temperature and thermal stability. Between the warmest and coldest sites, seasonal mean temperatures differed by 2.6˚C and degree day accumulations above freezing differed by a factor of 1.7. Larval metabolic and growth rates varied among the sites, and adult emergence occurred at different times. Distinct microhabitats also corresponded with differences in body composition, as lipid and carbohydrate content of larvae differed across sites. Further, seasonal changes in carbohydrate and protein content were dependent on site, indicating fine-scale variation in the biochemical composition of larvae as they prepare for winter. Together, these results demonstrate that variation in microhabitat properties influences the ontogeny, phenology, physiology, and biochemical makeup of midge populations living in close proximity. These results have implications for predicting responses of Antarctic ecosystems to environmental change.
南极海域的节肢动物生态
DOI: --
发表时间: 2013
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