Open AccessImplementing integrated measurements of Essential Biodiversity Variables at a national scale
Author(s) -
Bellingham Peter J.,
Richardson Sarah J.,
Gormley Andrew M.,
Allen Robert B.,
Cook Asher,
Crisp Philippa N.,
Forsyth David M.,
McGlone Matt S.,
McKay Meredith,
MacLeod Catriona J.,
DamBates Paul,
Wright Elaine F.
Publication year - 2020
Publication title -
ecological solutions and evidence
Language(s) - English
Resource type - Journals
ISSN - 2688-8319
DOI - 10.1002/2688-8319.12025
Subject(s) - biodiversity , shrubland , geography , vegetation (pathology) , abundance (ecology) , land use , environmental resource management , ecology , population , ecosystem , environmental science , biology , medicine , demography , pathology , sociology
Abstract 1. There is a global need for observation systems that deliver regular, timely data on state and trends in biodiversity, but few have been implemented, and fewer still at national scales. We describe the implementation of measurement of Essential Biodiversity Variables (EBVs) on an 8 km × 8 km grid throughout New Zealand, with multiple components of biodiversity (vegetation, birds, and some introduced mammals) measured simultaneously at each sample point. 2. Between 2011 and 2017, all public land was sampled nationally (ca. 1,350 points) and some private land (ca. 500 points). Synthetic appraisals of the state of New Zealand's biodiversity, not possible previously, can be derived from the first measurement of species distribution, population abundance, and taxonomic diversity EBVs. 3. Native bird counts (all species combined) were about 2.5 times greater per sample point in natural forests and shrublands than in non‐woody ecosystems, and native bird counts exceeded those of non‐native birds across all natural forests and shrublands. 4. Non‐native plants, birds, and mammals are invasive throughout, but high‐rainfall forested regions are least invaded, and historically deforested rain shadow regions are most invaded. 5. National reporting of terrestrial biodiversity across New Zealand's public land is established and becoming normalised, in the same manner as national and international reporting of human health and education statistics. The challenge is extending coverage across all private land. Repeated measurements of these EBVs, which began in 2017, will allow defensible estimates of biodiversity trends.