Orangutan nest surveys

Description:

Short project by students enrolled on Mres Tropical Forest Ecology to quantify orangutan density along transects cross logged forest-recently salvage logged forest boundaries. Method was distance-sampling of orangutan nests.

Project: This dataset was collected as part of the following SAFE research project: MRes Tropical Forest Ecology Field Course

XML metadata: GEMINI compliant metadata for this dataset is available here

Files: This consists of 1 file: TFE_orangutans.xlsx

TFE_orangutans.xlsx

This file contains dataset metadata and 2 data tables:

1. transects (described in worksheet transects)

   Description: Information on location of transects and date they were surveyed. Transects are recorded in the Locations sheet from GPS coordinates collected at the start and end point with a linear line interpolated between them. This over-simplifies the exact route of the trail which had twists and turns. A slightly more accurate trail could be reconstructed by joining GPS coordinates of individual nest sightings along each trail.

   Number of fields: 7

   Number of data rows: 12

   Fields:

   • Transect: Transect ID (Field type: location)
   • ec5_uuid: Code to link transect data to nest sightings (Field type: id)
   • Team_members: Names of team members collecting data (Field type: id)
   • Date: Date of data collection (Field type: date)
   • Block: SAFE project area in which transect was located (Field type: location)
   • Habitat: Habitat type (Field type: categorical)
   • Nest_sighting: Number of orangutan nests (Field type: abundance)

2. nests (described in worksheet nests)

   Description: individual nest sighting records

   Number of fields: 16

   Number of data rows: 98

   Fields:

   • ec5_uuid: Code to link nest sightings to transect information (Field type: id)
   • Distance_from_tra: Horizontal distance from trail to base of tree containing nest (Field type: numeric)
   • Height_above_grou: Nest height (Field type: numeric)
   • Tree_height_m: Height of tree containing nest (Field type: numeric)
   • Tree_species: Identity of tree containing nest (Field type: taxa)
   • Presence: Dummy variable to record presence of orangutan (Field type: abundance)
   • Nest_age: Decay state of the nest as described in Seaman et al 2019 (American Journal of Primatology) (Field type: ordered categorical)
   • Nest_size: Size of the nest (Field type: ordered categorical)
   • Animal_age: Age of the orangutan that made the nest (Field type: categorical trait)
   • Sex: Sex of the orangutan that made the nest (Field type: categorical trait)
   • Photo_file_name__: File name of photograph taken of the nest (photos not archived with this dataset) (Field type: id)
   • lat_21_GPS_coordinate: Latitude of nest location, taken from the trail. Nest is 'Distance_from_tra' metres away. (Field type: numeric)
   • long_21_GPS_coordinate: Longitude of nest location, taken from the trail. Nest is 'Distance_from_tra' metres away. (Field type: numeric)
   • accuracy_21_GPS_coordinate: Accuracy of GPS coordinates (Field type: numeric)
   • Position: Position of nest in tree (Field type: categorical)
   • Comments: Free text comments related to the nest; includes data on where in the tree the nest is located (Field type: comments)

Date range: 2018-01-22 to 2018-01-27

Latitudinal extent: 4.6837 to 4.7413

Longitudinal extent: 117.5304 to 117.6583

Taxonomic coverage:
All taxon names are validated against the GBIF backbone taxonomy. If a dataset uses a synonym, the accepted usage is shown followed by the dataset usage in brackets. Taxa that cannot be validated, including new species and other unknown taxa, morphospecies, functional groups and taxonomic levels not used in the GBIF backbone are shown in square brackets.