Peel, SL and Hill, NA and Foster, SD and Wotherspoon, SJ and Ghiglione, C and Schiaparelli, S, Reliable species distributions are obtainable with sparse, patchy and biased data by leveraging over species and data types, Methods in Ecology and Evolution, 10, (7) pp. 1002-1014. ISSN 2041-210X (2019) [Refereed Article]
Copyright 2019 the authors
- New methods for species distribution models (SDMs) utilise presenceľabsence (PA) data to correct the sampling bias of presence‐only (PO) data in a spatial point process setting. These have been shown to improve species estimates when both datasets are large and dense. However, is a PA dataset that is smaller and patchier than hitherto examined able to do the same? Furthermore, when both datasets are relatively small, is there enough information contained within them to produce a useful estimate of speciesĺ distributions? These attributes are common in many applications.
- A stochastic simulation was conducted to assess the ability of a pooled data SDM to estimate the distribution of species from increasingly sparser and patchier datasets. The simulated datasets were varied by changing the number of presenceľabsence sample locations, the degree of patchiness of these locations, the number of PO observations, and the level of sampling bias within the PO observations. The performance of the pooled data SDM was compared to a PA SDM and a PO SDM to assess the strengths and limitations of each SDM.
- The pooled data SDM successfully removed the sampling bias from the PO observations even when the presenceľabsence data were sparse and patchy, and the PO observations formed the majority of the data. The pooled data SDM was, in general, more accurate and more precise than either the PA SDM or the PO SDM. All SDMs were more precise for the species responses than they were for the covariate coefficients.
- The emerging SDM methodology that pools PO and PA data will facilitate more certainty around speciesĺ distribution estimates, which in turn will allow more relevant and concise management and policy decisions to be enacted. This work shows that it is possible to achieve this result even in relatively data‐poor regions.
|Item Type:||Refereed Article|
|Keywords:||Poisson point processes, presenceľabsence data, presence-only data, sampling bias, Southern Ocean, Mollusca, species distribution models, stochastic simulation|
|Research Division:||Environmental Sciences|
|Research Group:||Ecological Applications|
|Research Field:||Invasive Species Ecology|
|Objective Group:||Climate and Climate Change|
|Objective Field:||Climate Variability (excl. Social Impacts)|
|UTAS Author:||Peel, SL (Ms Samantha Peel)|
|UTAS Author:||Hill, NA (Dr Nicole Hill)|
|UTAS Author:||Wotherspoon, SJ (Dr Simon Wotherspoon)|
|Deposited By:||Oceans and Cryosphere|
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