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- W1971547707 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 220:131-136 (2001) - doi:10.3354/meps220131 Productivity estimation in Halodule wrightii Aschers: comparison of leaf-clipping and leaf-marking techniques and the importance of clip height Joseph L. Kowalski1, Hudson R. DeYoe1,*, Terry C. Allison1, James E. Kaldy2 1Department of Biology, The University of Texas - Pan American, 1201 West University Dr., Edinburg, Texas 78539 2Texas A&M University, Oceanography Department, College Station, Texas 77843, USA *E-mail: hdeyoe@panam.edu ABSTRACT: We compared estimates of Halodule wrightii leaf growth rates obtained from leaf-clipping and leaf-piercing methods in a south Texas lagoon. Leaf clipping underestimated leaf production from 15 to 37% in winter and 25 to 60% in summer relative to leaf piercing. The underestimation of leaf-clipping derived growth rates were corrected using a linear regression between leaf growth rates determined by leaf-clipping and leaf-piercing methods. To examine the effect of clip height on H. wrightii leaf growth rate estimation, leaves were clipped at 0, 2, 4, 6, and 8 cm above the sediment. Leaves clipped at 2 cm exhibited the fastest leaf growth rate (average = 3.66 mm d-1) while leaves clipped at 8 cm had the slowest rate (average = 2.30 mm d-1). Depressed leaf growth rates for 8 cm clip height were likely due to the slowing of growth rate with increasing leaf age. Reduced growth rate for the 0 cm clip height treatment may be attributable to removal of nearly all photosynthetic tissue and limited below-ground resources. In design of leaf-clipping studies, it is suggested that the selection of clip height and the period of growth after clipping be optimized for each season of a study. KEY WORDS: Leaf clipping · Leaf piercing · Productivity techniques · Halodule wrightii · Texas · Seagrass Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 220. Online publication date: September 27, 2001 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2001 Inter-Research." @default.
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- W1971547707 title "Productivity estimation in Halodule wrightii Aschers: comparison of leaf-clipping and leaf-marking techniques and the importance of clip height" @default.
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