Habitat thermal quality for Gopherus evgoodei in tropical deciduous forest and consequences of habitat modification by buffelgrass
Habitat thermal quality for Gopherus evgoodei in tropical deciduous forest and consequences of habitat modification by buffelgrass
复制标题
热带落叶林地鼠栖息地热质量及水牛草改变栖息地的后果
DOI：
10.1016/j.jtherbio.2022.103192
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发表时间：
2022
影响因子：
2.7
通讯作者：
Méndez-de La Cruz, Fausto R.
中科院分区：
文献类型：
--
作者：
Lara-Reséndiz, Rafael A.;Rosen, Philip C.;Sinervo, Barry;Miles, Donald B.;Méndez-de La Cruz, Fausto R.
地鼠属陆龟在北美进化，在过去 4000 万年里经受住了重大的环境挑战。然而，该属现在面临多种人为威胁，例如入侵植物物种的引入。水牛草 (Cenchrus ciliaris) 被认为是对地鼠龟栖息的干旱和热带生态系统的最大威胁之一，因为这种草取代了本地动植物群。这种入侵植物对环境的改变预示着现有热景观的改变。本文的目的有两个：1) 评估 Gopherus evgoodei（热带落叶林 [TDF]）主要栖息地的热质量，2) 确定由于水牛草改变栖息地而引起的潜在热变化。首先，我们获得了半圈养的活跃陆龟的体温数据。其次，我们测量了墨西哥索诺拉以南三个支持 G 的地点 5 年来的运行环境温度。 evgoodei：a) 原始 TDF（Conserved-TDF）； b) 被引入的水牛草牧场包围的一片森林（部分-TDF）； c) 引入水牛草牧场区（Buffel-Pasture）。我们的结果表明，TDF 内完整的微生境提供了 G。 evgoodei 在空间和时间尺度上都具有高热质量。然而，通过水牛草改变的栖息地对于G来说具有更高的工作温度。埃夫古德坦 TDF。被水牛草干扰的地点的热质量可以超过G的热要求。最高可达 25 °C。最后，我们讨论了水牛草入侵对栖息地改变的潜在附带影响。
Tortoises of the genusGopherusevolved in North America and have survived major environmental challenges in the past 40 million years. However, this genus now faces multiple anthropogenic threats, such as the introduction of invasive plant species. Buffelgrass (Cenchrus ciliaris) is considered one of the greatest threats to arid and tropical ecosystems, where gopher tortoises inhabit, because the grass displaces native flora and fauna. Modification of the environment as a result of this invasive plant portends an alteration of the available thermal landscape. The aim of this paper is twofold: 1) to evaluate the thermal quality of the primary habitat ofGopherus evgoodei(tropical deciduous forest [TDF], and 2) determine the potential thermal changes due to habitat modification by buffelgrass. First, we obtained data on body temperature of active tortoises in semi-captivity. Second, we measured the operative environmental temperature during 5 years at three sites south of Sonora, Mexico that supportG. evgoodei: a) a pristine TDF (Conserved-TDF); b) a forest patch surrounded by introduced buffelgrass pasture (Partial-TDF); and c) an introduced buffelgrass pasture area (Buffel-Pasture). Our results demonstrate that the intact microhabitats within the TDF provideG. evgoodeiwith high thermal quality at both spatial and temporal scales. However modified habitat by buffelgrass had higher operative temperatures forG. evgoodeithan TDF. The thermal quality of the sites disturbed with buffelgrass can exceed the thermal requirements ofG. evgoodeiby up to 25 °C. Finally, we discussed potential collateral effects of habitat modification by invasion by buffelgrass.