A method for determining the surface areas of various aquatic plants

Harrod, Jennifer J.; Hall, R. E.

doi:10.1007/bf00046315

Cited by 57 publications

(32 citation statements)

References 6 publications

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“…Bottle brush surface area : volume ratio (SA : V) was used as a complexity measure (Coull & Wells 1983). Surface area was measured by the detergent method of Harrod & Hall (1962) and Hicks (1977). Brush volume was measured by calculating the cylindrical volume of space taken up by the brush bristles.…”

Section: Methodsmentioning

confidence: 99%

Role of habitat complexity in mediating predation by the gray damselfish Abudefduf sordidus on epiphytal amphipods

Russo¹

1987

Mar. Ecol. Prog. Ser.

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In laboratory expenments w~t h artificial substrata Hawailan epiphytal amphlpods dld not select substrata for their complexlty Increased substrata complexlty did medlate predahon by the Hawallan damselflsh A b u d e f d u f s o r d d u sThe data also suggest that prey amphlpod mohon elicits predator f~s h stnkes These results corroborate recent studies w h c h directly relate habltat complexlty with Increased prey survival from predabon and contnbutes addit~onal information on the mechanism of prey selecbon by predators

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Section: Methodsmentioning

confidence: 99%

Role of habitat complexity in mediating predation by the gray damselfish Abudefduf sordidus on epiphytal amphipods

Russo¹

1987

Mar. Ecol. Prog. Ser.

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“…Structural complexity of macrophyte shape has been inferred from surface area to volume ratios (e.g., Coull & Wells, 1983), and interstitial space to volume ratios (e.g., Hacker & Steneck, 1990). Surface area has been determined by the surfactant technique (Harrod & Hall, 1962) as well as traditional Euclidean approaches (McAbendroth et al, 2005), whereas volume has been measured by water displacement (e.g., Anderson et al, 2005 for kelp holdfasts). Although informative, these indices do not provide an indication of shape or the arrangement of structural elements that comprise plant shape.…”

Section: Macrophytes and Macroalgaementioning

confidence: 99%

Habitat complexity: approaches and future directions

2011

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Habitat complexity is one of the most important factors structuring biotic assemblages, yet we still lack basic understanding of the underlying mechanisms. Although it is one of the primary targets in conservation management, no methods are available for comparing complexity across ecosystems, and system-specific qualitative assessment predominates. Despite its overwhelming importance for faunal diversity and abundance, there has been surprisingly little interest in examining its effects on other community and ecosystem attributes. We discuss possibilities of such effects, outlining potentially fruitful areas for future research, and argue that complexity may be implicated in community persistence and ecosystem stability by acting as a decoupling mechanism in predator-prey interactions. We provide a brief overview of methods used to quantify complexity in different ecosystems, highlighting contributions of the current issue of Hydrobiologia, and discuss potential application of these approaches for cross-ecosystem comparisons. Better understanding of the role of habitat complexity resulting from such comparisons is critically important for preservation of biodiversity and ecosystem function in an era of unprecedented habitat loss.

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“…The surface area of the colonies was calculated from a known relationship between surface area of an object and its increase in weight when dipped in water containing a surfactant (Harrod & Hall 1962, Hicks 1977. This relationship was obtained by regressing manual surface area measurements of 4 large, whole colonies and 10 smaller branches of each species on the weight increase after dipping.…”

Section: Methodsmentioning

confidence: 99%

Secondary production of gorgonian corals in the northern Gulf of Mexico

Mitchell¹,

Dardeau²,

Schroeder³

et al. 1992

Mar. Ecol. Prog. Ser.

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Gorgonians are the most conspicuous sessile macroinvertebrates at many hard-substrate sites in the northeastern Gulf of Mexico. Colonies from 3 sites, an isolated limestone outcropping at less than 2 m depth off coastal Florida (USA) and 2 exposed shelly sandstone and sandy rnudstone carbonate areas at depths of 22 and 27 m on the inner shelf off Alabama (USA), were sampled to estimate secondary production. Maximum colony ages ranged from 5 to 10 yr. Tissue mass for each age class was estimated from determinations of coenenchyme thickness and colony surface area. Secondary production was estimated from colony densities, age distribution, biomass per age class, and the increase in colony biornass between age classes. Production estimates for Leptogorgia hebes at the 2 offshore sites were 2.3 and 6.8 g ash-free dry mass (AFDM) yr-' while production of L. virgulata at the inshore site was 10.5 g AFDM m-2 yr-l, values similar to those reported for tropical scleractinian corals. Annual production-to-biomass ratios ranged from 0.37 to 0.45, indicating similar turnover times at all northern Gulf sites.

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A method for determining the surface areas of various aquatic plants

Cited by 57 publications

References 6 publications

Role of habitat complexity in mediating predation by the gray damselfish Abudefduf sordidus on epiphytal amphipods

Role of habitat complexity in mediating predation by the gray damselfish Abudefduf sordidus on epiphytal amphipods

Habitat complexity: approaches and future directions

Secondary production of gorgonian corals in the northern Gulf of Mexico

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