4 results match your criteria Aquatic Botany[Journal]

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An evaluation of factors controlling the abundance of epiphytes on along an estuarine gradient in Yaquina Bay, Oregon, USA.

Authors:
Walter G Nelson

Aquat Bot 2018 Aug;148:53-63

United States Environmental Protection Agency, Western Ecology Division, Pacific Coastal Ecology Branch, 2111 SE Marine Science Drive, Newport, OR, 97365, USA.

Epiphytes on seagrass () growing in the lower intertidal were examined along an estuarine gradient within Yaquina Bay, Oregon over a period of 4 years. The Yaquina Estuary receives high levels of nutrients from the watershed during the wet season and from the ocean during the dry season. Mean epiphyte biomass per unit seagrass leaf surface area (epiphyte load) peaked during the summer, and thus epiphyte load was higher during dry season than wet season in both marine and riverine dominated regions. Read More

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http://dx.doi.org/10.1016/j.aquabot.2018.04.010DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5998682PMC

Effects of microtopographic variation and macroalgal cover on morphometrics and survival of the annual form of eelgrass ().

Aquat Bot 2018 Feb;145:37-44

A disjunct population of the annual form of the seagrass that occurred in the upper intertidal zone of Yaquina Bay, Oregon was sampled to determine whether there were differences in recruitment, growth, survivorship and morphology associated with microtopographic location on the sand flat. Population responses of seagrass found in areas differing by only a few cm in vertical elevation were compared. There was higher plant abundance and higher number of shoots per plant in microtopographic low areas. Read More

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http://dx.doi.org/10.1016/j.aquabot.2017.11.008DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5746198PMC
February 2018

Patterns of shading tolerance determined from experimental light reduction studies of seagrasses.

Authors:
Walter G Nelson

Aquat Bot 2017 Jul;141:39-46

United States Environmental Protection Agency, Western Ecology Division, Pacific Coastal Ecology Branch, 2111 SE Marine Science Drive, Newport, OR, 97365, USA, phone: 1-541-867-5000,

A review and analysis of the experimental literature on seagrass shading evaluated the relationships among experimental light reduction, experimental duration, additional modifying factors and common meadow-scale seagrass response metrics to determine whether there were consistent statistical relationships. Modifying factors included study latitude, field site depth, season of experiment initiation, rhizome connectivity (severed, intact), experiment type (field, mesocosm), and seagrass life history strategy. Highly significant, best fit linear regression models were found for both biomass and shoot density reduction that included light reduction, duration and other modifying variables, although unexplained variation in the data were high. Read More

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http://dx.doi.org/10.1016/j.aquabot.2017.05.002DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6134870PMC

Macrophytes in shallow lakes: relationships with water, sediment and watershed characteristics.

Aquat Bot 2013 Aug;109:39-48

Wet Ecosystem Research Group, Department of Biological Sciences, North Dakota State University, NDSU Department 2715, P.O. Box 6050, Fargo, ND 58108-6050.

We examined macrophyte-environment relationships in shallow lakes located within the Prairie Parkland and Laurentian Mixed Forest provinces of Minnesota. Environmental variables included land cover within lake watersheds, and within-lake, water and sediment characteristics. CCA indicated that sediment fraction smaller than 63 μm (<63), open water area, turbidity, and percent woodland and agricultural cover in watersheds were significant environmental variables explaining 36. Read More

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http://dx.doi.org/10.1016/j.aquabot.2013.04.001DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3752979PMC
August 2013
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