PIE LTER surveys of salt marsh breeding birds using point counts in Rowley and Newbury, Massachusetts (Reformatted to a Darwin Core Archive)

This data package is formatted as a Darwin Core Archive (DwC-A, event core). For more information on Darwin Core see https://www.tdwg.org/standards/dwc/. This Level 2 data package was derived from the Level 1 data package found here: https://pasta.lternet.edu/package/metadata/eml/edi/336/2, which was derived from the Level 0 data package found here: https://pasta.lternet.edu/package/metadata/eml/knb-lter-pie/175/8. The abstract below was extracted from the Level 0 data package and is included for context: This data set contains the results of point count surveys of breeding birds in the salt marshes of the Plum Island Estuary. Surveys have been carried out each year in June beginning in 2004 and are ongoing. Currently six circles of 100 m radius are being surveyed. Three of the circles are in plots that had been regularly hayed and three in unhayed plots. Currently only one of the plots is regularly hayed. 85 species recorded as of 2020. Most frequently encountered are Agelaius phoeniceus, Ammospiza caudacuta, Tringa semipalmata. The Plum Island Ecosystems (PIE) LTER is developing a predictive understanding of the response of a linked watershed-marsh-estuarine system in northeastern Massachusetts to rapid environmental change. Over the last 30 years, surface sea water temperatures in the adjacent Gulf of Maine have risen at 3 times the global average, rates of sea-level rise have accelerated, and precipitation has increased. Coupled with these changes in climate and sea level are substantial changes within the rapidly urbanizing watersheds that influence water, sediment, and nutrient delivery to the marsh and estuary. In PIE IV our focus is on: Dynamics of coastal ecosystems in a region of rapid climate change, sea-level rise, and human impacts. NSF OCE LTER-Plum Island Ecosystems: Dynamics of coastal ecosystems in a region of rapid climate change, sea-level rise, and human impacts.本数据包采用达尔文核心档案（Darwin Core Archive, DwC-A，事件核心）格式。有关达尔文核心标准的更多详情，请参阅https://www.tdwg.org/standards/dwc/。 本二级数据包衍生自此处提供的一级数据包：https://pasta.lternet.edu/package/metadata/eml/edi/336/2，而该一级数据包又衍生自此处提供的零级数据包：https://pasta.lternet.edu/package/metadata/eml/knb-lter-pie/175/8。 以下摘要是从零级数据包中提取的，用于提供背景信息：本数据集包含普拉姆岛河口盐沼繁殖鸟类点计数调查成果。调查自2004年起每年6月开展，目前仍在持续进行。当前共设置6个半径100米的调查样圆，其中3个位于常规割草样地，另外3个位于未割草样地；目前仅有1个样地仍在定期割草。截至2020年，本数据集共记录85种鸟类，其中最常被观测到的物种为红翅黑鹂（Agelaius phoeniceus）、盐沼鹀（Ammospiza caudacuta）与半蹼鹬（Tringa semipalmata）。 普拉姆岛生态系统（Plum Island Ecosystems, PIE）长期生态研究（Long Term Ecological Research, LTER）计划，旨在构建马萨诸塞州东北部流域-沼泽-河口联动系统对快速环境变化响应的预测性认知。过去30年间，邻近缅因湾的表层海水升温速率达全球平均水平的3倍，海平面上升速率加快，降水量也有所增加。伴随气候与海平面变化的，还有快速城市化流域内的显著变化，这些变化会影响汇入沼泽与河口的水、沉积物与营养盐输送。 在PIE第四阶段研究中，我们的研究重点为：快速气候变化、海平面上升与人类活动影响下的沿海生态系统动态。 本项目受美国国家科学基金会（NSF）海洋科学部长期生态研究计划资助：《快速气候变化、海平面上升与人类活动影响下的沿海生态系统动态》。