NDLI: Hydrodynamic control of filamentous macroalgae in a sub-tropical spring-fed river in Florida, USA

Content Provider	Springer Nature Link
Author	King, Sean A.
Copyright Year	2014
Abstract	Hydrodynamic properties of rivers and streams are primary controls on the abundance and structure of algal communities. In Florida, USA, filamentous macroalgal proliferation in spring-fed rivers has largely been attributed to nitrogen enrichment; however, changes in hydrodynamics and other potential mechanisms have not been thoroughly evaluated. This study tested whether macroalgal abundance (primarily Lyngbya wollei) was related to hydrodynamics in Gum Slough, a sub-tropical Florida spring-fed river. Flow velocities and macroalgal cover were measured at three transects bimonthly between June 2010 and January 2013, a period during which river discharge fluctuated in response to a drought and a tropical storm. Temporal variation in macroalgal cover was significantly inversely related to flow velocity, excluding fall/winter sampling events when light limitation was likely. The results indicate a velocity threshold below which macroalgal cover increased substantially, and a lower threshold below which complete cover frequently occurred. Local differences in channel morphology and substrate type (i.e., aquatic plant beds) seemed to affect the relationship between macroalgal cover and velocity at each transect. Nitrogen and phosphorus concentrations and other water chemistry parameters were not associated with variation in macroalgal cover. Overall, this study suggests that hydrodynamics can strongly control filamentous macroalgae in Florida spring-fed rivers.
Starting Page	27
Ending Page	37
Page Count	11
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	734
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-04-03
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Macroalgae Hydrodynamics Velocity Discharge Lyngbya Springs Freshwater & Marine Ecology Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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