• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>San Francisco Estuary and Watershed Science >Distribution and Habitat Associations of California Black Rail () in the Sacramento–San Joaquin Delta
【24h】

Distribution and Habitat Associations of California Black Rail () in the Sacramento–San Joaquin Delta

机译：萨克拉曼多-圣华金三角洲的加利福尼亚黑铁分布与人居协会

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

doi: http://dx.doi.org/10.15447/sfews.2015v13iss4art4 Past studies documenting the distribution and status of state “Threatened California black rail (Laterallus jamaicensis coturniculus; hereafter black rail) have largely omitted the Sacramento—San Joaquin Delta (hereafter Delta). During March?to?May of 2009–2011, we conducted call–playback surveys to assess the status of the species within a wide range of wetland habitats of the central Delta region. We detected black rails at 21 of 107 discrete wetland sites, primarily on in-channel islands with dense cover. To better understand the habitat and land cover characteristics, we developed a model of habitat suitability from these occurrence data and a fine-scale vegetation and land use dataset using MaxEnt. We also evaluated differences in the size of wetlands at sites where black rails were detected versus where they were not. Through surveys and quantitative modeling, we found black rail presence differed from other regions within California and Arizona, in that it was positively associated with tall (1 to 5?m) emergent vegetation interspersed with riparian shrubs. Specific plants correlated with black rail presence included emergent wetland (Bolboschoenus acutus, B. californicus, B. acutus, Typha angustifolia, T. latifolia, Phragmites australis) and riparian (Salix exigua, S.?lasiolepis, Rosa californica, Rubus discolor, Cornus sericea) species. Median patch size was significantly larger and perimeter-to-area ratios were significantly lower at wetland sites where black rails were found. These results provide a preliminary characterization of black rail habitat in the Delta region and highlight the need for better understanding of this listed species’ population size and habitat use in the region, in light of anticipated climate change effects and proposed large-scale restoration in the Delta.
机译：doi：http：//dx.doi.org/10.15447/sfews.2015v13iss4art4以往的研究记录了州的分布和状况“受威胁的加利福尼亚黑铁路（Laterallus jamaicensis coturniculus;以下称黑铁路）在很大程度上省略了萨克拉曼多-圣华金三角洲（此后称为Delta）。在2009年至2011年3月至5月期间，我们进行了电话回放调查，以评估三角洲中部地区广泛的湿地栖息地中该物种的状况。我们在107个离散的湿地站点中的21个站点检测到黑轨，主要是在覆盖密集的河道内岛屿上。为了更好地了解栖息地和土地覆盖的特征，我们使用这些事件数据以及使用MaxEnt的小规模植被和土地利用数据集开发了栖息地适宜性模型。我们还评估了在发现黑轨的地方和未发现黑轨的地方，湿地面积的差异。通过调查和定量建模，我们发现黑铁轨的存在与加利福尼亚和亚利桑那州的其他地区有所不同，因为黑铁轨与散布在河岸灌木丛中的高大（1至5？m）新兴植被正相关。与黑杆存在相关的特定植物包括新兴湿地（Bolboschoenus acutus，B。californicus，B。acutus，Typha angustifolia，T。latifolia，Phragmites australis）和河岸植物（Salix exigua，S.lasiolepis，Rosa californica，Rusus discolor，Corus sericea）种。在发现黑轨的湿地上，中位数斑块尺寸明显更大，而周长比则明显更低。这些结果提供了三角洲地区黑铁路栖息地的初步特征，并强调了根据预期的气候变化影响和拟议中的大规模恢复措施，需要对该地区该物种的种群数量和栖息地使用情况有更好的了解。三角洲。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号