Cited by 194Marine and coastal plant biologyMarine and coastal ecosystemsMarine Biology and Ecology Research

Productivity and biomass of Thalassia testudinum as related to water column nutrient availability and epiphyte levels: field observations and experimental studies

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Tomasko, DA, Lapointe, BE·1991·Marine Ecology Progress Series

Abstract

Thalassia testudinum meadows from 0.5 m and 2.0 m (MLW) depths were studied a t 9 sites in the Florida Keys and western Caribbean.Two meadows, one offshore of a populated island with over 2000 septic tanks, and one offshore of a large bird rookery, were similar in having elevated levels of water column nutrients (DIN and SRP), greater epiphyte levels, low shoot densities, low leaf area indces, and low biomass.Increased blade turnover time was partially responsible for increased epiphyte levels offshore of the populated island, but epiphyte communities developed faster on seagrass blades there than at a paired site offshore of an uninhabited island.Results of aquarium experiments approximated the observed phenomena from the field studies: elevated water column nutrients produced increased epiphyte levels and decreased blade turnover rates.Reduced irradiance moderated the effect of nutrient enrichment on epiphyte levels.Elevated levels of water column nutrients, by stimulating epiphyte growth, reduced rhizome growth rates.This could b e related to the observed lower shoot density of T. testudinum meadows near sources of water column nutrient enrichment.

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  1. Bourcier, M. (1986). Evolution, en cinq annees, des herbiers a Posidonia oceanica et du macrobenthos circalittoral; action conjuguee des activites humaines et des modifications clirnatiques. Vie Milieu 36: 1-8 Cambridge, M. L , McComb, A J. (1984). The loss of seagrass in Cockburn Sound, Western Australia I. The time course and magnitude of seagrass decline in relation to industrial development. Aquat. Bot. 20: 229-243
  2. Moore, K. A., Wetzel, R. L., Neckles, H. A. (1989). Macrophyte and epiphyte response to variable light and nutrient regimes. (Abstract) In: Tenth Biennial International Estuarine Research Conference, BaItimore, MD. Estuarine Research Federation. p.

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Authors
Tomasko, D., & Lapointe, B.
Venue
Marine Ecology Progress Series
Published
1991
Volume
75
Pages
9-17
ISSN
  • 0171-8630 (ISSN-L)
  • 1616-1599
OpenAlex
W1981780075
Cited by
194
References
13
Citations by year
2026: 2 · 2024: 1 · 2023: 2 · 2021: 12 · 2020: 4 · 2019: 3 · 2018: 1 · 2017: 4 · 2016: 7 · 2015: 5 · 2014: 9 · 2013: 4 · 2012: 8
FWCI
2.67
Type
journal article
Language
en
Open access
Locations
Marine Ecology Progress Series (publishedVersion)
Funders
National Science Foundation (8812055)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal plant biology
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
  • Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine Biology and Ecology Research
Keywords
Thalassia testudinum, seagrass meadows, epiphytes, water column nutrients, nutrient enrichment, septic tanks, shoot density, rhizome growth, seagrass productivity, biomass, Florida Keys, western Caribbean

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