Sponge density increases with depth throughout the Caribbean: Comment
Sponge density increases with depth throughout the Caribbean: Comment
复制标题
整个加勒比海的海绵密度随着深度的增加而增加:评论
DOI:
10.1002/ecs2.2689
复制
发表时间:
2019
期刊:
影响因子:
2.7
通讯作者:
Alexander R. Scott
中科院分区:
文献类型:
--
作者:
J. Pawlik;Alexander R. Scott
We object to a recent publication in this journal claiming a consistent pattern of increasing sponge abundance with depth through the mesophotic zone (30–150 m) and throughout the Caribbean (Lesser and Slattery 2018) when the opposite relationship has been reported for some locations. We reviewed the scientific literature for patterns of abundance and diversity of sponges across mesophotic depths in the Caribbean (Scott and Pawlik 2018), prompted by similarly phrased and often-repeated statements in the literature asserting that the abundance and diversity of sponges consistently increase from 30 to 150 m depth throughout the Caribbean (the “sponge increase hypothesis”). After carefully reviewing the 17 studies we could find that reported one or more metric of sponge abundance or diversity as a function of depth across all or part of the mesophotic zone, we concluded that the evidence did not support this hypothesis: Among studies that reported metrics of sponge abundance at Caribbean sites, an increasing trend with depth was reported for four sites, a decrease at five sites, and a different pattern (variable, peak, dip, plateau, or no pattern) at 12 sites (Scott and Pawlik 2018: Table 1). Lesser and Slattery (2018) dismissed Scott and Pawlik (2018) as lacking “any quantitative analysis,” despite specific reference to statistical analyses performed by the cited authors, when available, in the text of the review. Lesser and Slattery (2018) chose to re-analyze the data from 3 of the 17 studies reviewed in Scott and Pawlik (2018), and also analyzed previously unpublished data from the Caribbean and Pacific. In conclusion, they re-asserted that “sponge density increases with depth throughout the Caribbean,” to quote the title of their contribution (Lesser and Slattery 2018). As we explained (Scott and Pawlik 2018), basic data on the abundance and diversity of benthic marine organisms on mesophotic reefs are both uncommon and non-standardized in methodology or depth range, and our conclusion that the evidence did not support the sponge increase hypothesis was based on the broadest assessment of available studies of sponges on Caribbean mesophotic reefs. This conclusion was made easier because the sponge increase hypothesis is very specific in asserting that metrics of abundance and diversity increase across the full mesophotic zone (30–150 m) and across the whole Caribbean biogeographic region, when only two studies (both from the Bahamas) included data from the full depth range (Scott and Pawlik 2018: Table 1). Nevertheless, Lesser and Slattery (2018) not only repeat their support for the sponge increase hypothesis, they now suggest that it may be a global phenomenon. We question the selective analysis of data in Lesser and Slattery (2018) from only 3 of the 17 studies listed in Table 1 of Scott and Pawlik (2018). While some of these studies are limited to only a portion of the mesophotic zone, use different metrics, are poorly replicated, etc., the trends in their data, or lack of trends, should not be dismissed when considering the sponge increase hypothesis. Further, one study listed in Table 1 of Scott and Pawlik (2018) included the same depth range and metrics as most of the studies analyzed in Lesser and Slattery (2018), but was not included in their analyses: Rivero-Calle (2010) reported replicate photo-transect data documenting sponge cover off the coast of Puerto Rico at 30 to 100 m depth. We grouped the transect data reported in Figure 10 of Rivero-Calle (2010) by location, with transects Citation: Pawlik, J. R., and A. R. Scott. 2019. Sponge density increases with depth throughout the Caribbean: Comment. Ecosphere 10(4):e02689. 10.1002/ecs2.2689 Received 20 December 2018; revised 21 February 2019; accepted 26 February 2019. Corresponding Editor: Debra P. C. Peters. Copyright: © 2019 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Department of Biology and Marine Biology, Center for Marine Science, University of North Carolina Wilmington, Wilmington, North Carolina 28409 USA. E-mail: pawlikj@uncw.edu
影响因子:
2.7
作者:
Lesser, Michael P.;Slattery, Marc
通讯作者:
Slattery, Marc