+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Macroalgae in marine soft-sediment communities: Effects on benthic faunal assemblages

, : Macroalgae in marine soft-sediment communities: Effects on benthic faunal assemblages. Journal of Experimental Marine Biology and Ecology 175(2): 253-274

Algal removal experiments were conducted in 1984 and 1986 to measure the effects of algal cover on the structure of an intertidal benthic assemblage, Cover by the green alga, Ulva expansa (Setchell) Setchell et Gardner, had no affect on total density or species richness of small fauna, compared to removal plots, during the algal season in either year, although diversity indexes (h' and D) were slightly greater in removal plots. Epifauna had consistently greater densities in algal plots, while infaunal densities were not different in 1984, and greater in algal plots in 1986. Mobile, sediment-water interface feeding taxa were the numerically dominant infauna, and along with predators, exhibited the same patterns as infauna in general. Sedentary sediment-water interface feeders had lower densities under algal cover, while the density of deep deposit-feeders was not different between treatments. Large bivalves, principally the tellinid Macoma nasuta (Conrad), were significantly reduced by algal cover in both years. Post-algal season samples in the 1986 experiment revealed that after a season of algal cover, the densities of small, mobile, sediment-water interface feeding infauna were significantly greater, and those of sedentary species, particularly bivalves and tubicolous suspension-feeders were significantly lower, in plots which had supported an algal mat. The increased abundance of small deposit-feeding fauna was likely a result of an increase in food resources due to in situ burial and decomposition of macroalgae. These experiments indicate that, like other submerged aquatic vegetation (SAV), macroalgae can play an important functional role in structuring benthic faunal assemblages. However, in contrast to other SAV, the presence of macroalgae, particularly laminar forms such as Ulva, can have a mixed effect on the density of benthic fauna. Mobile sediment-water interface feeding species can have greater densities, while the densities of sedentary species, especially bivalves adn tube-dwellers, can be much lower with algal cover.


DOI: 10.1016/0022-0981(94)90030-2

Other references

Lahav, M.; Epstein, O.; Schoenfeld, N.; Shaklai, M.; Atsmon, A., 1987: Increased porphobilinogen deaminase activity in patients with malignant lymphoproliferative diseases. A helpful diagnostic test. Patients with malignant lymphoproliferative diseases, ie, chronic lymphocytic leukemia and lymphoma, were found to have higher porphobilinogen deaminase (PBGD) activity in their peripheral lymphocytes than normal control subjects, patients with ot...

Bittermann, T.; Goldberg, D.S.; Bauer, C.M.; Khungar, V., 2017: Characterizing the Risk of False-Positive Hepatocellular Carcinoma in Recipients Transplanted With T2 MELD Exceptions. Patients with hepatocellular carcinoma (HCC) can receive Model for End-Stage Liver Disease (MELD) exception points to increase waitlist priority for liver transplantation. This process does not require a biopsy and is based on radiologic criteria....

Nekvasil Coraor Hanna; Burnham C.W.yne, 1983: Thermodynamic modeling of crystallization paths of felsic silicate melts. Abstracts with Programs - Geological Society of America 15(6): 651

Lózsa, R.; Csorba, T.; Lakatos, Lóránt.; Burgyán, József., 2008: Inhibition of 3' modification of small RNAs in virus-infected plants require spatial and temporal co-expression of small RNAs and viral silencing-suppressor proteins. Plant viruses are inducers and targets of RNA silencing. Viruses counteract with RNA silencing by expressing silencing-suppressor proteins. Many of the identified proteins bind siRNAs, which prevents assembly of silencing effector complexes, and a...

Boonyasiriwat, C.; Schuster, G., 2010: 3D multisource full-waveform inversion using dynamic quasi-Monte Carlo phase encoding. Geophysical Research Abstracts 12

Berki T.; Nemeth P.; Hegedus J., 1988: Biological effect of low power helium neon laser irradiation. The functional effects (activation and cell damage) of low-power, continuous-wave HeNe laser irradiation were studied in different in vitro cultured cell lines. A characteristic dose-dependence was observed between 0.14 and 28.0 J/cm2. The functio...

Murphy, E.K., 2001: The presence of sales representatives in the OR. Aorn Journal 73(4): 822-824

Butturini, U.; Bonomini, V., 1957: Effect of glycogen on kidneys. II. Changes in tubular transport of phosphate, bicarbonate, ammonium ions & acid anions. Bollettino Della Societa Italiana di Biologia Sperimentale 33(7): 963-965

Encinas Sotillos, A.; Romero Ganuza, F.J.; Hernández Navarrete, C.; Cabrerizo Puente, A., 1991: Gilbert's syndrome and cholesterolosis. Anales de Medicina Interna 8(4): 204-205

Nihoul-Fékété, C., 2005: Does surgical genitoplasty affect gender identity in the intersex infant?. There is no clear-cut answer to the question of whether surgical genitoplasty affects gender identity in the intersex infant. The debate centres around which is more important for the development of gender identity: the biological sex of a child o...