Veazey​ et al. 2016

scientific article | PeerJ | open access Open access

The implementation of rare events logistic regression to predict the distribution of mesophotic hard corals across the main Hawaiian Islands

Veazey​ LM, Franklin EC, Kelley C, Rooney​ J, Frazer LN, Toonen RJ

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Predictive habitat suitability models are powerful tools for cost-effective, statistically robust assessment of the environmental drivers of species distributions. The aim of this study was to develop predictive habitat suitability models for two genera of scleractinian corals (Leptoserisand Montipora) found within the mesophotic zone across the main Hawaiian Islands. The mesophotic zone (30–180 m) is challenging to reach, and therefore historically understudied, because it falls between the maximum limit of SCUBA divers and the minimum typical working depth of submersible vehicles. Here, we implement a logistic regression with rare events corrections to account for the scarcity of presence observations within the dataset. These corrections reduced the coefficient error and improved overall prediction success (73.6% and 74.3%) for both original regression models. The final models included depth, rugosity, slope, mean current velocity, and wave height as the best environmental covariates for predicting the occurrence of the two genera in the mesophotic zone. Using an objectively selected theta (“presence”) threshold, the predicted presence probability values (average of 0.051 for Leptoseris and 0.040 for Montipora) were translated to spatially-explicit habitat suitability maps of the main Hawaiian Islands at 25 m grid cell resolution. Our maps are the first of their kind to use extant presence and absence data to examine the habitat preferences of these two dominant mesophotic coral genera across Hawai‘i.

10.7717   peerj.2189
Depth range
30- 180 m

Mesophotic “mentions”
56 x (total of 6898 words)

Community structure

Overall benthic (groups)
Scleractinia (Hard Corals)

USA - Hawaii

Remotely Operated Vehicle (ROV)
Manned Submersible
Autonomous Underwater Vehicle (AUV)

Author profiles
Christopher Kelley ( 5 pubs)
Rob Toonen ( 12 pubs)
Erik Franklin ( 2 pubs)