Show simple item record

dc.contributor.authorTodd, Brandi
dc.contributor.authorBallantine, David L.
dc.contributor.authorOtero, Ernesto
dc.date.accessioned2015-11-21T21:31:46Z
dc.date.available2015-11-21T21:31:46Z
dc.date.issued2009
dc.identifier.issn0008-6452
dc.identifier.urihttp://hdl.handle.net/123456789/2670
dc.description.abstractA survey was conducted to investigate possible presence of an inshore to shelf edge gradient in % nitrogen (%N) and stable nitrogen isotope ratio (δ 15 N; ‰ vs. air) in tissues of the rhodophyte Acanthophora spicifera and the ocrophytes Lobophora variegata and Dictyota bartayresiana in coastal waters of La Parguera, southwest Puerto Rico. Average %N (1.26 ± 0.08 SD to 3.25 ± 0.10) and δ 15 N (2.06 ± 0.04 to 8.16 ± 0.14‰) in Acanthophora spicifera was highly variable along the shoreline. The highest inshore values of δ 15 N occurred at two stations influenced by secondary sewage input and a bird rookery and lower values (0.81 ± 0.06‰) were observed at mid-shelf locations. Dictyota bartayresiana and L. variegata did not display clear trends in %N across the insular shelf; however, δ 15 N for Dictyota bartayresiana was significantly higher inshore(3.48 ± 0.09‰) versus mid-shelf and shelf edge (0.00 ± 0.08‰) and δ 15 N for L. variegata was significantly higher at mid-shelf (2.13 ± 0.25‰) versus shelf edge locations (0.34 ± 0.24‰). These results indicate that anthropogenic effects on tissue nutrients are spatially distributed across the shelf, being higher near shore and not evident at the shelf edge.
dc.description.sponsorshipCollege of Arts and Sciences University of Puerto Rico, Mayagüez
dc.language.isoen
dc.publisherCaribbean Journal of Science, Vol. 45, No. 2-3, 181-190, 2009
dc.subjectCaribbean
dc.subjectPuerto Rico
dc.subjectLa Parguera
dc.subjectAlgae
dc.titleNutrient distribution across the insular shelf of La Parguera, Puerto Rico: assessment by algal tissue nitrogen
dc.typeArticle


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record