范围广泛的密度揭示了北美东部森林陆地脊椎动物生物质的关键组成部分
Evan H Campbell Grant1, Jillian Fleming1, Elizabeth Bastiaans2
1U.S. Geological Survey, Eastern Ecological Science Center (Patuxent Wildlife Research Center), 1 Migratory Way, Turners Falls, MA 01376, USA.
Biology letters
|August 14, 2024
概括
东部红背,Plethodon cinereus,在北美东部地区表现出高的人口密度. 它们的生物量与鹿和老鼠等主要消费者的生物量相美,甚至超过了它们的生物量.
科学领域:
- 生态生态学 生态生态学
- 脊椎动物动物学 脊椎动物动物学
- 生物多样性研究 生物多样性研究
背景情况:
- 人口密度是一个关键的生态指标.
- 北美东部是斑牙 salamanders 的生物多样性热点.
- 东部红背 (Plethodon cinereus) 广泛分布,但由于检测不确定性,研究具有挑战性.
研究的目的:
- 为了准确估计Plethodon cinereus在其范围内的种群密度.
- 为了比较P. cinereus生物质与其他丰富的陆地脊椎动物.
- 评估在温带生态系统中的生态意义.
主要方法:
- 利用一个大规模的研究网络和系统的调查协议.
- 分析了来自18个研究领域的标记回收数据.
- 采用了强大的统计模型来解释不完美的检测.
主要成果:
- 据估计,的密度从1950年到每公34300只 (中位数9965/ha).
- 黄金的生物量与主要消费者 (鹿,Peromyscus小鼠) 相当或超过.
- P. cinereus的生物量是其他二次消费者的100-1000倍.
结论:
- 在北美东部,P. cinereus是陆地脊椎动物生物质的重要组成部分.
- 两动物,特别是P. cinereus,在温带生态系统中发挥着巨大的作用.
- 标准化方法和强大的模型对于准确的生态密度估计至关重要.
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