季风对社区的影响 土地使用连续性的两个温带源流支流中的热带
Hee Yoon Kang1,2, Byeong-Gweon Lee2, Jae-Ki Shin3
1School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
Scientific reports
|October 29, 2024
概括
季风雨对山头河流的食物网的影响很小. 虽然农业用地使用影响营养投入,但大雨后的脉冲流不会显著改变这些生态系统中的食物或社区结构.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 淡水生物学 淡水生物学
背景情况:
- 季风雨中的脉冲流可以影响河流生态系统.
- 这些流动对源流食物网的影响,特别是跨越不同土地使用梯度的影响,尚不清楚.
研究的目的:
- 为了研究强的季风雨如何影响源泉河流中宏观无脊椎动物和鱼类的热带.
- 评估食物网结构的变化,从森林到农业用地使用的梯度.
主要方法:
- 基本资源和消费者 (宏无脊椎动物和鱼类) 的稳定同位素分析 (碳和).
- 在韩国苏河两条支流大雨前后进行采样,韩国.
- 在不同的季节和土地使用类型中比较同位素.
主要成果:
- 基础资源季节性地显示出一致的同位素值,生物膜更富含碳-13.
- -15值从林地增加到农业区,表明营养来源不同.
- 消费者同位素值随着时间的推移而稳定,但在纵向上有所变化,只有有限的证据表明季风雨对食物网的重塑显著.
结论:
- 季风降雨似乎对源流食物网的社区热带有很小的直接影响.
- 同位素值的纵向变化表明,农业对下游的食物网有很大的影响.
- 食物网结构更多地受到土地使用模式的影响,而不是季风雨带来的季节性脉冲流.
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