Tropicalisation of temperate reefs: Implications for ecosystem functions and management actions

Adriana Verges, Erin McCosker, Mariana Mayer-Pinto, Melinda A. Coleman, Thomas Wernberg, Tracy Ainsworth, Peter D. Steinberg

Research output: Contribution to journalReview article

8 Citations (Scopus)

Abstract

Temperate reefs from around the world are becoming tropicalised, as warm-water species shift their distribution towards the poles in response to warming. This is already causing profound shifts in dominant foundation species and associated ecological communities as canopy seaweeds such as kelp are replaced by tropical species. Here, we argue that the cascading consequences of tropicalisation for the ecosystem properties and functions of warming temperate reefs depend largely on the taxa that end up dominating the seafloor. We put forward three potential tropicalisation trajectories, that differ in whether seaweeds, turf or corals become dominant. We highlight potential gains to certain ecosystem functions for some tropicalisation endpoints. For example, local benthic fish productivity may increase in some tropicalised reefs as a higher proportion of primary production is directly consumed, but this will be at the expense of other functions such as carbon export. We argue that understanding these changes in flows of energy and materials is essential to formulate new conservation strategies and management approaches that minimise risks as well as capture potential opportunities. Regardless of which trajectory is followed, tropicalised systems represent largely novel ecosystem configurations. This poses major challenges to traditional conservation and environmental management approaches, which typically focus on maintaining or returning species to particular locations. We outline management practices that may either mitigate predicted structural and functional changes or make the most of potential new opportunities in tropicalised reefs. These include marine protected areas to increase resilience and connectivity, the development of new fisheries that target range-expanding invaders, and assisted evolution and migration strategies to facilitate the dominance of large habitat formers like corals or seaweeds. We highlight important ecological and ethical challenges associated with developing novel approaches to manage tropicalised reefs, which may need to become increasingly interventionist. As technological innovations continue to emerge, having clear goals and considering the ethics surrounding interventions among the broader community are essential steps to successfully develop novel management approaches. A plain language summary is available for this article.

Original languageEnglish
Pages (from-to)1000-1013
Number of pages14
JournalFunctional Ecology
Volume33
Issue number6
DOIs
Publication statusPublished - Jun 2019

Cite this

Verges, A., McCosker, E., Mayer-Pinto, M., Coleman, M. A., Wernberg, T., Ainsworth, T., & Steinberg, P. D. (2019). Tropicalisation of temperate reefs: Implications for ecosystem functions and management actions. Functional Ecology, 33(6), 1000-1013. https://doi.org/10.1111/1365-2435.13310
Verges, Adriana ; McCosker, Erin ; Mayer-Pinto, Mariana ; Coleman, Melinda A. ; Wernberg, Thomas ; Ainsworth, Tracy ; Steinberg, Peter D. / Tropicalisation of temperate reefs : Implications for ecosystem functions and management actions. In: Functional Ecology. 2019 ; Vol. 33, No. 6. pp. 1000-1013.
@article{658eec3b1bd64bfbaae674708bdae822,
title = "Tropicalisation of temperate reefs: Implications for ecosystem functions and management actions",
abstract = "Temperate reefs from around the world are becoming tropicalised, as warm-water species shift their distribution towards the poles in response to warming. This is already causing profound shifts in dominant foundation species and associated ecological communities as canopy seaweeds such as kelp are replaced by tropical species. Here, we argue that the cascading consequences of tropicalisation for the ecosystem properties and functions of warming temperate reefs depend largely on the taxa that end up dominating the seafloor. We put forward three potential tropicalisation trajectories, that differ in whether seaweeds, turf or corals become dominant. We highlight potential gains to certain ecosystem functions for some tropicalisation endpoints. For example, local benthic fish productivity may increase in some tropicalised reefs as a higher proportion of primary production is directly consumed, but this will be at the expense of other functions such as carbon export. We argue that understanding these changes in flows of energy and materials is essential to formulate new conservation strategies and management approaches that minimise risks as well as capture potential opportunities. Regardless of which trajectory is followed, tropicalised systems represent largely novel ecosystem configurations. This poses major challenges to traditional conservation and environmental management approaches, which typically focus on maintaining or returning species to particular locations. We outline management practices that may either mitigate predicted structural and functional changes or make the most of potential new opportunities in tropicalised reefs. These include marine protected areas to increase resilience and connectivity, the development of new fisheries that target range-expanding invaders, and assisted evolution and migration strategies to facilitate the dominance of large habitat formers like corals or seaweeds. We highlight important ecological and ethical challenges associated with developing novel approaches to manage tropicalised reefs, which may need to become increasingly interventionist. As technological innovations continue to emerge, having clear goals and considering the ethics surrounding interventions among the broader community are essential steps to successfully develop novel management approaches. A plain language summary is available for this article.",
keywords = "Anthropocene, climate change, ecosystem function, herbivory, kelp, shifting species interactions, tropicalisation, CLIMATE-CHANGE, CORAL-REEFS, MARINE RESERVES, RANGE EXPANSION, PHASE-SHIFT, FISH, HABITAT, RECRUITMENT, BIODIVERSITY, CONNECTIVITY",
author = "Adriana Verges and Erin McCosker and Mariana Mayer-Pinto and Coleman, {Melinda A.} and Thomas Wernberg and Tracy Ainsworth and Steinberg, {Peter D.}",
year = "2019",
month = "6",
doi = "10.1111/1365-2435.13310",
language = "English",
volume = "33",
pages = "1000--1013",
journal = "Functional Ecology",
issn = "0269-8463",
publisher = "John Wiley & Sons",
number = "6",

}

Verges, A, McCosker, E, Mayer-Pinto, M, Coleman, MA, Wernberg, T, Ainsworth, T & Steinberg, PD 2019, 'Tropicalisation of temperate reefs: Implications for ecosystem functions and management actions' Functional Ecology, vol. 33, no. 6, pp. 1000-1013. https://doi.org/10.1111/1365-2435.13310

Tropicalisation of temperate reefs : Implications for ecosystem functions and management actions. / Verges, Adriana; McCosker, Erin; Mayer-Pinto, Mariana; Coleman, Melinda A.; Wernberg, Thomas; Ainsworth, Tracy; Steinberg, Peter D.

In: Functional Ecology, Vol. 33, No. 6, 06.2019, p. 1000-1013.

Research output: Contribution to journalReview article

TY - JOUR

T1 - Tropicalisation of temperate reefs

T2 - Implications for ecosystem functions and management actions

AU - Verges, Adriana

AU - McCosker, Erin

AU - Mayer-Pinto, Mariana

AU - Coleman, Melinda A.

AU - Wernberg, Thomas

AU - Ainsworth, Tracy

AU - Steinberg, Peter D.

PY - 2019/6

Y1 - 2019/6

N2 - Temperate reefs from around the world are becoming tropicalised, as warm-water species shift their distribution towards the poles in response to warming. This is already causing profound shifts in dominant foundation species and associated ecological communities as canopy seaweeds such as kelp are replaced by tropical species. Here, we argue that the cascading consequences of tropicalisation for the ecosystem properties and functions of warming temperate reefs depend largely on the taxa that end up dominating the seafloor. We put forward three potential tropicalisation trajectories, that differ in whether seaweeds, turf or corals become dominant. We highlight potential gains to certain ecosystem functions for some tropicalisation endpoints. For example, local benthic fish productivity may increase in some tropicalised reefs as a higher proportion of primary production is directly consumed, but this will be at the expense of other functions such as carbon export. We argue that understanding these changes in flows of energy and materials is essential to formulate new conservation strategies and management approaches that minimise risks as well as capture potential opportunities. Regardless of which trajectory is followed, tropicalised systems represent largely novel ecosystem configurations. This poses major challenges to traditional conservation and environmental management approaches, which typically focus on maintaining or returning species to particular locations. We outline management practices that may either mitigate predicted structural and functional changes or make the most of potential new opportunities in tropicalised reefs. These include marine protected areas to increase resilience and connectivity, the development of new fisheries that target range-expanding invaders, and assisted evolution and migration strategies to facilitate the dominance of large habitat formers like corals or seaweeds. We highlight important ecological and ethical challenges associated with developing novel approaches to manage tropicalised reefs, which may need to become increasingly interventionist. As technological innovations continue to emerge, having clear goals and considering the ethics surrounding interventions among the broader community are essential steps to successfully develop novel management approaches. A plain language summary is available for this article.

AB - Temperate reefs from around the world are becoming tropicalised, as warm-water species shift their distribution towards the poles in response to warming. This is already causing profound shifts in dominant foundation species and associated ecological communities as canopy seaweeds such as kelp are replaced by tropical species. Here, we argue that the cascading consequences of tropicalisation for the ecosystem properties and functions of warming temperate reefs depend largely on the taxa that end up dominating the seafloor. We put forward three potential tropicalisation trajectories, that differ in whether seaweeds, turf or corals become dominant. We highlight potential gains to certain ecosystem functions for some tropicalisation endpoints. For example, local benthic fish productivity may increase in some tropicalised reefs as a higher proportion of primary production is directly consumed, but this will be at the expense of other functions such as carbon export. We argue that understanding these changes in flows of energy and materials is essential to formulate new conservation strategies and management approaches that minimise risks as well as capture potential opportunities. Regardless of which trajectory is followed, tropicalised systems represent largely novel ecosystem configurations. This poses major challenges to traditional conservation and environmental management approaches, which typically focus on maintaining or returning species to particular locations. We outline management practices that may either mitigate predicted structural and functional changes or make the most of potential new opportunities in tropicalised reefs. These include marine protected areas to increase resilience and connectivity, the development of new fisheries that target range-expanding invaders, and assisted evolution and migration strategies to facilitate the dominance of large habitat formers like corals or seaweeds. We highlight important ecological and ethical challenges associated with developing novel approaches to manage tropicalised reefs, which may need to become increasingly interventionist. As technological innovations continue to emerge, having clear goals and considering the ethics surrounding interventions among the broader community are essential steps to successfully develop novel management approaches. A plain language summary is available for this article.

KW - Anthropocene

KW - climate change

KW - ecosystem function

KW - herbivory

KW - kelp

KW - shifting species interactions

KW - tropicalisation

KW - CLIMATE-CHANGE

KW - CORAL-REEFS

KW - MARINE RESERVES

KW - RANGE EXPANSION

KW - PHASE-SHIFT

KW - FISH

KW - HABITAT

KW - RECRUITMENT

KW - BIODIVERSITY

KW - CONNECTIVITY

U2 - 10.1111/1365-2435.13310

DO - 10.1111/1365-2435.13310

M3 - Review article

VL - 33

SP - 1000

EP - 1013

JO - Functional Ecology

JF - Functional Ecology

SN - 0269-8463

IS - 6

ER -