The use of δ15N in assessing sewage stress on coral reefs

Risk, Michael J.; Lapointe, Brian E.; Sherwood, Owen A.; Bedford, Bradley J.

doi:10.1016/j.marpolbul.2009.02.008

Cited by 127 publications

(76 citation statements)

References 71 publications

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“…There is a large and growing body of work attesting to the ability of δ 15 N to track sewage input in the oceans. This subject has recently been reviewed (Risk et al 2009), and only a summary will be provided herein. The utility of the δ 15 N technique lies in the fact that nutrients derived from animals wastes, septic systems and sewage treatments plants are enriched in δ 15 N (Heikoop et al 2000, Rogers 2003, Savage & Elmgren 2004.…”

Section: Introductionmentioning

confidence: 99%

Tracking the record of sewage discharge off Jeddah, Saudi Arabia, since 1950, using stable isotope records from antipatharians

Risk¹,

Sherwood²,

Nairn³

et al. 2009

Mar. Ecol. Prog. Ser.

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Section: Introductionmentioning

confidence: 99%

Tracking the record of sewage discharge off Jeddah, Saudi Arabia, since 1950, using stable isotope records from antipatharians

Risk¹,

Sherwood²,

Nairn³

et al. 2009

Mar. Ecol. Prog. Ser.

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“…Worldwide, some of the major barriers to accomplish conservation goals in coastal areas are the difficulty to understand the human impact in natural systems (Granja-Fernández & López-Pérez 2009, Risk et al 2009, Selkoe et al 2009) and the integration of a holistic approach that considers both terrestrial and aquatic ecosystems (Crosby et al 2002, Herbert et al 2010. Natural Protected Areas (NPAs) are the chief legal instruments for biodiversity conservation, and they have grown in importance globally (Moreno-Casasola et al 2005, Ban 2009, Herbert et al 2010.…”

mentioning

confidence: 99%

Government conservation policies on Mexican coastal areas: is ?top-down? management working?

Nava¹,

Ramírez‐Herrera²

2011

RBT

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Marine and terrestrial ecosystems are declining globally due to environmental degradation and poorly planned resource use. Traditionally, local government agencies have been responsible of the management of natural reserves to preserve biodiversity. Nonetheless, much of these approaches have failed, suggesting the development of more integrative strategies. In order to discuss the importance of a holistic approach in conservation initiatives, coastal and underwater landscape value and biological/environmental indicators of coral reef degradation were assessed using the study case of Zihuatanejo, Guerrero coastal area. This area shelters representative coral reef structures of the Eastern Pacific coast and its terrestrial biodiversity and archaeology enhance the high value of its coastal area. This study explored the landscape value of both terrestrial and marine ecosystems using the geomorphosite approach in two sites on the Zihuatanejo coastal area: Caleta de Chon and Manzanillo Beach. Sedimentation rate, water transparency, chlorophyll and total suspended solids were recorded underwater in each site for environmental characterization. 50 photo-quadrants on five transects were surveyed between 3-4m depth to record coverage (%) of living corals, dead corals, algae, sand and rocks. The conservation status of coral reefs was assessed by the coral mortality index (MI). Landscape values showed that both terrestrial and marine ecosystems had important scientific and aesthetic values, being Manzanillo Beach the site with the highest potential for conservation initiatives (Ttv=14.2). However, coral reefs face elevated sedimentation rates (up to 1.16kg/m 2 d) and low water transparency (less of 5m) generated by coastal land use changes that have increased soil erosion in the adjacent coastal area. High coverage of dead corals (23.6%) and algae (up to 29%) confirm the low values in conservation status of coral reefs (MI=0.5), reflecting a poorly-planned management. Current conditions are the result of "top-down" conservation strategies in Zihuatanejo, as Federal and Municipal authorities do not coordinate, disregard local community in coral reef management, and ignore the intimate relationship between the coastal and marine realms. This work confirms the importance of conservation strategies with a holistic approach, considering both terrestrial and marine ecosystems in coastal areas; and that these initiatives should include local coastal communities in management and decision-taking processes done by government authorities. Rev. Biol. Trop. 59 (4): 1487-1501. Epub 2011 December 01.

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“…Subsamples of Padina sp., turf algae and sediment were treated with hydrochloric acid and rinsed with deionized water for analysis of organic δ 13 C, and the remaining untreated sample was used for δ 15 N (Risk et al, 2009). Samples were analyzed for stable isotopic ratios of carbon ( 13 C/ 12 C) and nitrogen ( 15 N/ 14 N) using a Thermo Finnigan Delta Plus mass spectrometer coupled with a Flash EA 112 elemental analyzer at the Leibniz Centre for Tropical Marine Research (Bremen, Germany).…”

Section: Fish and Benthic Collectionmentioning

confidence: 99%

Contrasting Responses in the Niches of Two Coral Reef Herbivores Along a Gradient of Habitat Disturbance in the Spermonde Archipelago, Indonesia

et al. 2018

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Habitat modification of coral reefs is becoming increasingly common due to increases in coastal urban populations. Coral reef fish are highly dependent on benthic habitat; however, information on species-specific responses to habitat change, in particular with regard to trophic strategies, remains scarce. This study identifies variation in the trophic niches of two herbivorous coral reef fishes with contrasting trophic strategies, using Stable Isotopes Bayesian Ellipses in R, along a spatial gradient of changing coral reef habitats. In the parrotfish Chlorurus bleekeri, a roving consumer, the range of δ 15 N and δ 13 C and their niche area displayed significant relationships with the amount of rubble in the habitat. In contrast, the farming damselfish, Dischistodus prosopotaenia, showed a narrow range of both δ 15 N and δ 13 C, displaying little change in niche parameters among sites. This may indicate that parrotfish vary their feeding according to habitat, while the damselfish continue to maintain their turf and invertebrate resources. Assessing isotopic niches may help to better understand the specific trophic responses to change in the environment. Furthermore, the use of isotopic niches underlines the utility of stable isotopes in studying the potential impacts of environmental change on feeding ecology.

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The use of δ15N in assessing sewage stress on coral reefs

Cited by 127 publications

References 71 publications

Tracking the record of sewage discharge off Jeddah, Saudi Arabia, since 1950, using stable isotope records from antipatharians

Tracking the record of sewage discharge off Jeddah, Saudi Arabia, since 1950, using stable isotope records from antipatharians

Government conservation policies on Mexican coastal areas: is ?top-down? management working?

Contrasting Responses in the Niches of Two Coral Reef Herbivores Along a Gradient of Habitat Disturbance in the Spermonde Archipelago, Indonesia

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