Article Synopsis
- Urbanization leads to biodiversity loss due to the replacement of complex natural habitats with simpler marine structures.
- Eco-engineering aims to improve urban marine environments by retrofitting complex habitat panels to seawalls, which have shown varied positive impacts on biodiversity after two years.
- The study emphasizes that diverse habitat features, like rockpools and crevices, promote higher biodiversity and unique species, underscoring the need for tailored eco-engineering solutions based on the specific needs of marine organisms and their environments.
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Article Abstract
Urbanization is leading to biodiversity loss through habitat homogenization. The smooth, featureless surfaces of many marine urban structures support ecological communities, often of lower biodiversity, distinct from the complex natural habitats they replace. Eco-engineering (design for ecological co-benefits) seeks to enhance biodiversity and ecological functions on urban structures. We assessed the benefits to biodiversity of retrofitting four types of complex habitat panels to an intertidal seawall at patch (versus flat control panels) and site (versus unmodified control seawalls and reference rocky shores) scales. Two years after installation, patch-scale effects of complex panels on biodiversity ranged from neutral to positive, depending on the protective features they provided, though all but one design (honeycomb) supported unique species. Water-retaining features (rockpools) and crevices, which provided moisture retention and cooling, increased biodiversity and supported algae and invertebrates otherwise absent. At the site scale, biodiversity benefits ranged from neutral at the high- and mid-intertidal to positive at the low-intertidal elevation. The results highlight the importance of matching eco-engineering interventions to the niche of target species, and environmental conditions. While species richness was greatest on rockpool and crevice panels, the unique species supported by other panel designs highlights that to maximize biodiversity, habitat heterogeneity is essential. This article is part of the theme issue 'Ecological complexity and the biosphere: the next 30 years'.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9234820 | PMC |
| http://dx.doi.org/10.1098/rstb.2021.0393 | DOI Listing |
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