Dataset - Three neotropical bird species shift nest-site preferences from swollen-thorn acacias to other sites in human-altered habitats

The Excel file includes four datasheets.

· #Nests_trees: refers to the observed number of bird nests by tree species in
the different habitats. It also includes nests placed on electrical wires or
electricity poles. The spreadsheet includes the expected number of nests,
calculated from the proportional abundance at each habitat, and the
standardized residuals (standardized difference between observed and expected
values)

· #Nests_ants: it includes the number of bird nests on swollen-thorn acacias
(Vachellia collinsii), and the ant species nesting inhabiting it, and
separated by the sampled habitats.

· Tree_abundance includes the number of trees by habitat of the 15 species
where at least one of the three birds of interest nested on. All other
censused trees are in the category "Other".

· Acacia-ant_abundance includes the number of ant-species by habitat that were
associated with an acacia tree in which were at least one bird nest of
interest.

该Excel文件包含四个工作表。
· #Nests_trees：该工作表记录了不同生境下按树木种类统计的观测鸟巢数量，同时涵盖架设于电线或电线杆上的鸟巢。表格中还包含基于各生境物种比例丰度计算得到的预期鸟巢数，以及标准化残差（观测值与预期值间的标准化差值）。
· #Nests_ants：该工作表包含膨刺金合欢（Vachellia collinsii）上的鸟巢数量、筑巢栖息于其上的蚂蚁物种信息，并按采样生境进行分类。
· Tree_abundance：该工作表包含三种目标鸟类曾有筑巢记录的15个树种按生境统计的树木数量，其余所有被普查的树木均归入“其他”类别。
· Acacia-ant_abundance：该工作表包含按生境统计的、与存在至少一处目标鸟类鸟巢的金合欢树相关联的蚂蚁物种数量。