hernandez & rivera 2015 pta tierra coral reefs report

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    Preliminary Determination of Acroporid Coral

    Designated Critical Habitats Across Puerta de Tierra

    Urban Coral Reefs, San Juan, Puerto Rico  

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    1

    Edwin A. Hernández-Delgado1,2,3*, Ivangs Rivera1

    1Sociedad Ambiente Marino, PO Box 22158, San Juan, PR 00931-21582University of Puerto Rico, Center for Applied Tropical Ecology and Conservation, Coral Reef Research Group,

    San Juan, Puerto Rico 00931-33603University of Puerto Rico, Department of Biology, San Juan, Puerto Rico 00931-3360

    *Corresponding author: [email protected] 

    February 16, 2015

     Abstract  —  The objective of this preliminary assessment of Puerta de Tierra marine natural systems was to:1) Provide a rapid qualitative assessment of adjacent benthic communities across the potentially impacted

    zone by project “Paseo Lineal de San Juan” northern segment; 2) Determine if there were ESA-listed coralspecies across adjacent coral reefs; 3) Determine the spatial extension of Acroporid coral designated critical

    habitats (DCH) across the zone; and 4) Determine the spatial extension of essential fish habitats (EFH)

    across the zone. Surveyed benthic habitats showed the common presence of Endanged Species Act (ESA)-listed Elkhorn coral ( Acropora palmata) and a very low abundance of the Laminar star coral (Orbicella

     faveolata) within less than 200 m from the shoreline. There were also multiple colonies of A. palmata located

    within 50 m or less from the shoreline. Preliminary observations suggested that, nearly the entire surveyedsegment dominated by colonized pavement and patch reefs constituted part of the Acroporid corals DCH.Though only one colony of O. faveolata was observed during the preliminary inspection, and though no

    DCH has been officially designated yet for this species, this habitat represents also critical habitats for its

    presence. The existing coral biodiversity preliminarily documented in this survey showed a total of 26

    species within 700 linear meters of reefs along the shoreline, including 3 hydrocorals, 11 octocorals and 12

    scleractians or hard corals. A preliminary survey of fish fauna also showed a total of 59 species, belongingto 37 genera and 25 families. This is only a preliminary list and future surveys may guarantee that this list

    is likely to grow. The surveyed reef segment constitutes a very important essential fish habitat (EFH) for

    multiple reef fish species, including species managed by the Commonwealth of Puerto Rico and the

    National Marine Fisheries Service (NMFS). There was also presence of submerged aquatic vegetation

    (SAV) across the adjacent benthic systems, but environmental impacts of the project to any of these marineecosystems were not addressed. A massive landslide is significantly impacting the shoreline and adjacent

    coral reefs ecosystems. There is a need to immediately stabilize this active landslide to reduce furtherimpacts to adjacent coral reefs and SAV, including DCH of Acroporid corals. There is a need to: 1)

    Determine the spatial extent of Acroporid coral DCH across adjacent reef bottoms; 2) Determine thepresence of any of the seven ESA-listed coral species across adjacent reef bottoms; 3) Address impacts to

    EFH; and 4) Initiate consultation with NMFS under section 7 of ESA; and 5) Prepare an EnvironmentalImpact Statement in full compliance with Law 147. There is no evidence in the available public record of

    this project that the construction of an abandoned breakwater in navigable waters of the Atlantic Ocean

    was permitted by the US Army Corps of Engineers. This should also be addressed. According to the

    available public record, potential environmental impacts of this project on coral reef ecosystems were not

    addressed. Though this project will not be constructed within navigable waters, there is significant

    potential for permanent adverse impacts on coral reefs associated to the construction of this project couldbe significant and permanent and must be immediately addressed. 

    Preliminary Determination of Acroporid Coral Designated

    Critical Habitats Across Puerta de Tierra Urban Coral Reefs,

    San Juan, Puerto Rico 

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