DOI: 10.25911/5c36e1cf219a0
title: Upland Heath Swamps Plot Network: Vegetation (Structure and Floristics), Dharawal National Park and Dharawal Nature Reserve, Sydney Basin, NSW, Australia, 1983-2014
title: Upland Heath Swamps Plot Network: Vegetation Structure and Floristics Dharawal National Park, 1983-2014

description: These data represent the entire collection of vegetation floristics and structure data for the Upland Heath Swamps Plot Network.

This package contains information on the vegetation species present in 54 established swamp monitoring sites in upland swamps scattered throughout the study area (Keith and Myerscough 1993). 

The Upland Heath Swamps Plot Network research plots commenced in 1983 and have been revisited in 2004, 2009 and again in 2014. 

A synopsis of related data packages which have been collected as part of the Upland Heath Swamps Plot Network’s full program is provided at https://doi.org/10.25911/5c1313b2b2644.
description: Abstract: These data represent the entire collection of vegetation floristics and structure data for the Upland Heath Swamps Plot Network.<br><br>This package contains information on the vegetation species present in 54 established swamp monitoring sites in upland swamps scattered throughout the study area (Keith and Myerscough 1993). <br><br>The Upland Heath Swamps Plot Network research plots commenced in 1983 and have been revisited in 2004, 2009 and again in 2014. 

A synopsis of related data packages which have been collected as part of the Upland Heath Swamps Plot Network’s full program is provided at https://doi.org/10.25911/5c1313b2b2644


Sampling method: Originally each sample site was a belt transect of 60 contiguous 0.5x0.5 m quadrats, in which presence/absence of all vascular plant taxa are recorded (based on whether they were overhanging the quadrats) and tallied to give a frequency out of 60. The sites were originally sampled in 1983, marked in the field by two wooden stakes at either end of the transect, and plotted on a 1:10 000 aerial photograph. By 2004, it was possible to relocate 54 of the 60 original transects and of these, at least one of the original markers was found for 20 transects. During the intervening years, some of the wooden markers had been consumed by fires, but based on the annotated aerial photograph, field notes and detailed recollections of the original observer (David Keith), transects were confidently reestablished within approximately 10 m of their original location. These formed the basis for establishing permanent swamp monitoring sites, which are now marked in the field at the positions of quadrats 1 and 30 with steel star pickets, extending approximately 1. 5 m above ground surface, and located on the Map Grid of Australia (Geodectic Datum of Australia) using a global positioning system.

Exploration and subsampling of the 1983 data showed that the floristic relationships between the 60 sites could be adequately retrieved if species frequencies were calculated from a sample of 30 quadrats within each transect (correlation of association matrices based on 60 and 30 quadrats yielded Mantel’s R&gt;0.95). Therefore, only the first 30 quadrats of each transect were re-sampled in 2004 (Keith et al. 2007). Vegetation sampling was repeated in 2009-2010 and 2014. The next census is scheduled for 2019 or within 12 months of the next bushfire, whichever occurs first.

Study extent: These sites were originally sampled in 1983, then in 2004, 2009-2010 and 2014. Vegetation structure was only surveyed in 2014. The next census is scheduled for 2019 or within 12 months of the next bushfire, whichever occurs first.

Project funding: Between 2012 and 2018 this project was part of, and funded through the Long Term Ecological Research Network (LTERN) a facility within the Terrestrial Ecosystem Research Network (TERN) and supported by the Australian Government through the National Collaborative Research Infrastructure Strategy.