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Titolo:
Biomechanical properties of the reproductive shoots of eelgrass
Autore:
Patterson, MR; Harwelll, MC; Orth, LM; Orth, RJ;
Indirizzi:
Coll William & Mary, Sch Marine Sci, Virginia Inst Marine Sci, Gloucester Point, VA 23062 USA Coll William & Mary Gloucester Point VA USA 23062 ter Point, VA 23062 USA
Titolo Testata:
AQUATIC BOTANY
fascicolo: 1, volume: 69, anno: 2001,
pagine: 27 - 40
SICI:
0304-3770(200101)69:1<27:BPOTRS>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANGIOSPERM ZOSTERA-MARINA; SUBMARINE POLLINATION; CHESAPEAKE BAY; FLOW; GROWTH; CONSEQUENCES; MORPHOLOGY; HABITATS; TISSUE; LIGHT;
Keywords:
Zostera marina L.; eelgrass; biomechanics; breaking stress; breaking strain; toughness; elastic modulus; Rhipidia; Weibull distribution;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Patterson, MR Coll William & Mary, Sch Marine Sci, Virginia Inst Marine Sci, Gloucester Point, VA 23062 USA Coll William & Mary Gloucester Point VA USA 23062 23062 USA
Citazione:
M.R. Patterson et al., "Biomechanical properties of the reproductive shoots of eelgrass", AQUATIC BOT, 69(1), 2001, pp. 27-40

Abstract

The biomechanical properties of freshly collected eelgrass (Zostera marinaL.) reproductive shoots from a site in the mesohaline region of the Chesapeake Bay during the period of seed release were investigated using a tensometer. Internodal segments closest to, and farthest away from the substrate were loaded in tension until they broke. Breaking stress (strength), breaking strain, toughness, and elastic modulus were calculated from the tensometer data and measurements of the final broken cross-sectional area of each internodal segment. Paired sample tests for individual shoots of the internodal segments closest to and farthest away from the substrate indicated no difference in material properties or cross-sectional area at the location ofthe break; however, internodal segment length was significantly longer (10%) further away from the substrate, and there is a trend of higher values (25-50% higher) for all mechanical attributes. Breaking stress, elastic modulus, and toughness, were not normally distributed, but significantly followa Weibull distribution, while internodal segment length, shoot length, andbreaking force were normally distributed. There was no relationship between strength and elastic modulus, but toughness was significantly correlated with strength, meaning strong reproductive shoots can also absorb large strain energies imparted by the environment before breaking. Mean strength, toughness, and elastic modulus are similar to other plants for which these data exist, including macroalgae. The finding of Weibull distributions in biomechanical attributes of the field population indicates that a few strong tough reproductive shoots are always present to resist extreme events, that might otherwise dislodge an entire population. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 23:19:35