DOI: 10.5281/zenodo.5937972
title: Data from: A new population record of Critically Endangered Dipterocarpus bourdillonii Brandis from the Anamalai Tiger Reserve, Tamil Nadu

description: <strong>This dataset is based on the following manuscript/publication:</strong><br> Page, N., S. Kasinathan, K. Bhat, G. Moorthi, T. Sundarraj, Divya Mudappa, and T. R. S. Raman (submitted MS). A new population record of Critically Endangered <em>Dipterocarpus bourdillonii</em> Brandis from the Anamalai Tiger Reserve, Tamil Nadu. Submitted manuscript. <br> Please refer to the README.txt file included with the dataset for complete details and usage notes. <strong>Geographic Coverage:</strong><br> Location/Study Area: Valparai Plateau, Tamil Nadu, India; Anamalai Tiger Reserve, Tamil Nadu, India<br> GPS coordinates: Valparai Plateau (0°15'- 10°22'N, 76°52'-76°59'E); Anamalai Tiger Reserve (10°12'-10°35'N, 76°49'-77°24'E) <strong>Temporal Coverage:</strong><br> Begins: 2020-10-01 (Year, Month, Day)<br> Ends: 2021-04-30 (Year, Month, Day) <strong>Funding:</strong><br> Fondation Franklinia<br> AMM Murugappa Chettiar Research Centre<br> Rohini Nilekani Philanthropies <strong>Dataset:</strong><br> The dataset includes 9 files: 1 text file (<strong>README.txt</strong>), 5 data files in comma-delimited format (CSV), and 3 KML files of survey routes. Details of content of each CSV data file are provided below. The following files are included:<br> README.txt: Usage notes and metadata related to the dataset<br> 1_Surveys.csv: Details of trails covered where Dipterocarpus bourdillonii was recorded during the survey<br> 2_Focal_tree_data.csv: Details of focal trees of Dipterocarpus bourdillonii<br> 3_Tree_centred_PCQ.csv: Data from point-centred quarter (PCQ) plots sampled with focal trees at the centre<br> 4_Plant_checklist.csv: Checklist of plants (mainly trees) recorded on survey trails<br> 5_Seed-fruit.csv: Measurements of fruits and seeds of Dipterocarpus bourdillonii<br> 2021-01-30_Manamboli_track.kml: Anali to Ayyankulam to Manamboli (Trail-2)<br> 2021-03-26-Ayyankulam-track.kml: Ayyankulam survey (Trail-4)<br> 2021-04-10-Ayyankulam Parai-trail2-track.kml: Anali Pudhukadu coffee boundary to Ayyankulam Parai (Trail-5) Details and data available in the columns in each of the above CSV files are explained below. <strong>1_Surveys.csv</strong><br> Column: Description<br> Date: Date on which the survey was done<br> Place: Name of the place where the focal tree is located. e.g., Candura, Manamboli, Iyerpadi etc<br> Route_description:Description of place or route covered<br> Trail: Name of the tree survey trail<br> Trail_distance: Distance covered on the trail in kilometres (km)<br> Track_filename_kml: Name of the file with GPS track of survey trail/route, where available, in KML format<br> Sample_collected: Samples of unidentified species collected to confirm the species identity<br> Observers: Names of observers who took measurements and filled datasheet during survey<br> Remarks: Notes and additional information <strong>2_Focal_tree_data.csv</strong><br> Column: Description<br> FT_ID: Unique numeric linking ID of each focal tree<br> Species: Focal tree species<br> Date: Date on which the survey was done<br> Place: Name of the place where the focal tree is located. e.g., Candura, Manamboli, Iyerpadi etc<br> Waypoint: Unique location waypoint number for the focal tree and GPS instrument used<br> Time: Time when the focal tree's data was collected<br> Location: Landmark where the focal tree is located<br> Latitude: Latitude of the focal tree (decimal degrees N)<br> Longitude: Longitude of the focal tree (decimal degrees E)<br> Elevation: Elevation of the focal tree from sea-level in metres<br> Slope: Slope at focal tree location assessed with Clinometer, categorised as Flat, Gentle, Moderate, or Steep<br> ID_Notes: Any obvious signs with which to identify focal tree<br> Phenophase: Phenophase of the focal tree viz. leaf flush, buds/flowers, fruits<br> GBH: Girth of the focal tree in cm, at 1.3m from ground; measured from the higher side if tree is on slope.<br> Tree_ht: Focal tree's height in m (height of observer added if measured using rangefinder)<br> Canopy_ht: Height of canopy in m where the focal tree is located (height of observer added if measured using rangefinder)<br> Substrate: Substrate where focal tree is standing viz. Earth, Rock, Streamside, Other<br> Invasives: List of invasive plant species present within 5 m radius around the focal tree<br> Stature: Stature of the focal tree relative to its surroundings (NOT of the species in general) categorised as Understorey, Mid, Canopy, Emergent<br> Relatively: Relative height of focal tree in relation to other trees within 10 m radius categorised as Shorter than most, Taller than most, Same height as most<br> Deadwood: Estimated percentage of deadwood present on the tree in 4 classes of &lt;25%, 26-50%, 51-75%, 76-100%<br> Damage: Observed damages such as Main trunk broken, Branches broken, Hollow at base, Gaping cavity, Infected, Dried leaves (as on a dead branch)<br> Shape: Canopy shape of the focal tree (not species in general) categorised as Spreading, Oval, Fan, Column, Cone<br> Closure: Canopy closure due to foliage visually estimated standing next to trunk of focal tree and looking up, categorised as 0% (only sky and leafless branches visible), 1-25%, 26-50%, 51-75%, 76-100%<br> Seedlings: Count of conspecific seedlings (stems of girth at breast height &lt;10 cm) around the focal tree in a 5 m radius<br> Saplings: Count of conspecific saplings (stems of girth at breast height 10-30 cm) around the focal tree in a 5 m radius<br> Trees: Count of conspecific trees (stems of girth at breast height &gt;30 cm) around the focal tree in a 5 m radius<br> Remarks: Notes and additional information <strong>3_Tree_centred_PCQ.csv</strong><br> Column: Description<br> FT_ID: Unique numeric linking ID of each focal tree<br> Focal_tree: Scientific name of focal tree species at the centre of the point-centred quarter (PCQ) plot<br> Species: Scientific name of tree species recorded in PCQ plot around focal tree<br> GBH (cm): Girth of PCQ tree in cm, at 1.3 m from ground; measured from the higher side if tree is on a slope. Main stem only.<br> Distance: Distance from focal tree, in m; measured from the approximate centre of bole to centre of bole and not bark to bark<br> Multistem: NA if single-stemmed; if multi-stemmed, then GBH of additional stems given as notes. <strong>4_Plant_checklist.csv</strong><br> Column: Description<br> Date: Date on which the survey was done<br> Place: Name of the place where the focal tree is located. e.g., Candura, Manamboli, Iyerpadi etc<br> Trail: Name of the tree survey trail<br> Checklist_species: Scientific name of tree species observed as present along trail and within 10 m on either side<br> Remarks: Notes and additional information <strong>5_Seed_Fruit.csv</strong><br> Column: Description<br> Sample: Serial number of sample of single winged fruit measured<br> Species: Scientific name of tree species<br> No_Seeds: Unit number of seed measured<br> Fresh_fruit_weight_g: Weight of each fruit measured on an Ohaus scale in grams<br> Nut_length_cm: Length of nut along the longitudinal axis in cm<br> Nut_width_1_cm: Width of nut in cm measured along axis perpendicular to nut length<br> Nut_width_2_cm: Width of nut in cm measured along axis perpendicular to nut length and nut width 1<br> Wing1_length_cm: Length of longer wing (sepal) in cm<br> Wing1_width_cm: Width of longer wing (sepal) in cm<br> Wing2_length_cm: Length of shorter wing (sepal) in cm<br> Wing2_width_cm: Width of shorter wing (sepal) in cm <strong>7-9: KML files</strong><br> The following KML GPS track files are also included<br> 2021-01-30_Manamboli_track.kml: Anali to Ayyankulam to Manamboli (Trail-2)<br> 2021-03-26-Ayyankulam-track.kml: Ayyankulam survey (Trail-4)<br> 2021-04-10-Ayyankulam Parai-trail2-track.kml: Anali Pudhukadu coffee boundary to Ayyankulam Parai (Trail-5)