Effects of consumers and enrichment on abundance and diversity of benthic algae in a rocky intertidal community

Guerry, Anne D.; Menge, Bruce A.; Dunmore, Robyn A.

doi:10.1016/j.jembe.2008.11.011

Cited by 36 publications

(32 citation statements)

References 66 publications

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“…No published information is available to explain why these species are more sensitive to nitrate addition during the ENSO conditions; therefore more research is needed to understand why they are nutrients sensitive. Foliose algae such as Ulva or Porphyra that have high surface area volume ratios, and some of the highest half-saturation constants for N (Lobban and Harrison 1994) are thought to be the most likely to do better in nutrient-enriched conditions (Guerry et al 2009), but in our experiment those forms did not show any positive reaction. It was documented that seagrasses like Zostera marina and Ruppia maritima respond positively when fertilized, especially to phosphate, and when they are isolated from other plants (Harlin and Thorne-Miller 1981).…”

Section: Discussioncontrasting

confidence: 56%

“…The effect of nutrient enrichment could affect the community as a whole or affect some species, such as dominant species (Palumbi 2003). Experimental manipulations of nutrient availability in rocky systems are not frequent (Guerry et al 2009). Some researchers have documented important effects (Bosman et al 1986;Diaz-Pulido and McCook 2005;Worm and Sommer 2000;Nielsen 2001;Kraufvelin et al 2006), while others have seen little or no effect of enrichment (Wootton et al 1996;Pfister and Van Alstyne 2003).…”

Section: Introductionmentioning

confidence: 99%

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Effect of nutrient availability on understory algae during El Niño Southern Oscillation (ENSO) conditions in Central Pacific Baja California

et al. 2011

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An experimental study of the effect of artificial nutrient supply on understory algae was made during 1997 El Niño Southern Oscillation (ENSO) at the Mexican Pacific coast of Baja California. Twelve quadrats of 1 m 2 were placed on the sea bed. Six quadrats were used as controls, and six were treatments with added artificial nutrients. Nutrients were supplied using polyvinyl chloride (PVC) pipes filled with slow-release inorganic fertilizer. The algae species composition and cover in each quadrat were estimated using the random point quadrat method.The percent of cover was tested using a multifactorial analysis of variance, and significant differences were obtained by post hoc Tukey's HSD test. The analysis was carried out annually, seasonally, and seasonal and monthly for each species. The seawater temperature was recorded, and compared with historical data. The bottom and surface seawater nitrate concentration were measured. Twenty-five species of macroalgae and one seagrass were identified. The most abundant species was Corallina vancouveriensis (−N=19.8% and +N=26.6% average cover). The other species had lower than 10% cover. Significant differences of species percent cover between experimental groups (+N and −N) were detected in the annual analysis (p=0.059). Seasonal analysis did not showed significant differences for any season. Monthly analysis showed significant differences in average percent cover when nutrients were added in eight species in different months: Bossiella orbigniana (August); Colpomenia sinuosa (June); Corallina officinalis (August); C. vancouveriensis (June); Dictyota flabellata (September); Eisenia arborea (June); Gracilaria marcialana (June); Macrocystis pyrifera (October), and the seagrass Phyllospadix torreyi (September and December).In conclusion, not all seaweed species are sensitive to nutrient addition during the ENSO years. In this research, we found eight species and one seagrass that had a positive reaction to the nutrients during the most severe stage (summer) of the ENSO.

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Section: Discussioncontrasting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Effect of nutrient availability on understory algae during El Niño Southern Oscillation (ENSO) conditions in Central Pacific Baja California

et al. 2011

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“…Ulva sp. has large surface areas and halfsaturation constants for nitrogen (Lobban and Harrison, 1997), and may thus grow better in higher nutrient conditions (Guerry et al, 2009). In our study, the concentration of dissolved inorganic nitrogen was high (>4.5 μmol/L; Fig.4c) year round, suggesting that nitrogen availability is not limiting macroalgal growth.…”

Section: Discussionmentioning

confidence: 99%

Temporal and spatial variations in the distribution of macroalgal communities along the Yantai coast, China

Han

Liu

2014

Chin. J. Ocean. Limnol.

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To explore the impact of environmental variables on macroalgal communities, their temporal and spatial distributions were examined along the Yantai coast, China between April 2010 and March 2011. Macroalgae sampling was conducted monthly at four sites along the coast: Jiahe River estuary, Zhifu Island, Fisherman's Wharf, and Yangma Island. The species composition and abundance, and their relationship with environmental variables were assessed. Along the Yantai coast, 35 macroalgae species were identifi ed, including 24 Rhodophyta spp., 7 Chlorophyta, and 4 Phaeophyta spp. Highest species numbers were recorded in the summer at all sampling sites, except in the Jiahe River estuary. Macroalgae biomass was the greatest in the summer. Year-round, the highest species number and dry biomass recorded at Fisherman's Wharf and Yangma Island was attributed to the substrate type. In summer, Ulva pertusa Kjellman was the dominant species identifi ed along the Yantai coast, which indicates a risk of macroalgae blooms. Our results show that seawater temperature and nutrients appear to signifi cantly affect the temporal and spatial patterns of macroalgal abundance along the Yantai coast. The effects of environmental variables on the macroalgae on the Yantai coast need further study.

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“…in the upper part of the sublittoral zone suggest that the present level of nutrient input is not detrimental to the habitat-building brown algae in the fjord. Grazing has been shown to be important for the maintenance of habitat-forming large brown algae in eutrophicated areas, by removing rapidly growing filamentous algae (Worm et al 1999;Worm & Lotze 2006;Guerry et al 2009). There are probably few mesograzers in the sublittoral of Hardangerfjord due to the relatively low salinity (Brattegard 1966), and the lower limit of algal growth may be controlled by the large sea urchin populations alone.…”

Section: Abundance Of Dominant Functional Groupsmentioning

confidence: 99%

Historical changes in macroalgal communities in Hardangerfjord (Norway)

Husa

Steen

Sjøtun

2013

Marine Biology Research

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Hardangerfjord is the second largest fjord in Norway and is situated on the southwest coast. During the last century the fjord has been influenced by a variety of anthropogenous activities such as industry, hydro-electrical power plants and since 1980 an increase in fish farming. This study was carried out in order to investigate whether changes in the macroalgal communities of Hardangerfjord have taken place since the 1950s. The macroalgal composition at a number of stations investigated in 2008Á2009 was compared to recordings from the same stations during the 1950s. While the distribution and abundance of dominant groups (fucoids, kelps) showed a high resilience when compared to recordings from the 1950s, some changes in the macroalgal communities in the fjord were evident. The present study showed higher species richness and a higher frequency of species with a warm-water affinity. Since the first part of the 1990s an increase in summer sea surface temperatures has taken place in the area, and the observed algal changes suggest a pronounced temperature effect on macroalgal communities. A number of red algal species was observed to protrude further into the fjord in the present study than in the 1950s, probably caused by altered salinity regime due to the electrical power industry.

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Effects of consumers and enrichment on abundance and diversity of benthic algae in a rocky intertidal community

Cited by 36 publications

References 66 publications

Effect of nutrient availability on understory algae during El Niño Southern Oscillation (ENSO) conditions in Central Pacific Baja California

Effect of nutrient availability on understory algae during El Niño Southern Oscillation (ENSO) conditions in Central Pacific Baja California

Temporal and spatial variations in the distribution of macroalgal communities along the Yantai coast, China

Historical changes in macroalgal communities in Hardangerfjord (Norway)

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