نتایج جستجو برای: coralline red algae
تعداد نتایج: 167355 فیلتر نتایج به سال:
Throughout the ages, macroalgae have provided humankind with elements beneficial to human health, and often bioactive abilities. Yet, while today we fully acknowledge such potential, especially that of most widely known species, an even greater number species remain unaknowledged. This holds particularly true for highly diverse phylum Rhodophyta (red seaweeds) and, therefore, present study aims...
Red tide is a natural phenomenon that changes sea color by harmful algal bloom. There has been a lot of study on red tide due to increasing of red tide damage. However, to automatically recognize the red tide algae images present in previous studies are not enough. It is difficult to recognize red tide algae images because they do not have matching features for recognizing various species of al...
Free-living red coralline algae play an important role in the carbon and carbonate cycles of coastal environments. In this study, we examined physiology free-living algae-forming maerl beds Bay Brest (Brittany, France), where Lithothamnion corallioides is dominant (i.e., rhodolith) species. Phymatolithon calcareum Lithophyllum incrustans are also present (in lower abundances) at a specific site...
Rhodoliths are nodules of non-geniculate coralline algae that occur in shallow waters (<150 m depth) subjected to episodic disturbance. Rhodolith beds stand with kelp beds, seagrass meadows, and coralline algal reefs as one of the world's four largest macrophyte-dominated benthic communities. Geographic distribution of rhodolith beds is discontinuous, with large concentrations off Japan, Austra...
In this study, four well-exposed outcrops of the Asmari Fm in the southeastern part of the Izeh Zone of the Zagros Mountains were measured and sampled. In this region, the Asmari Fm is Oligocene to Early Miocene in age as determined by large benthic foraminifera. Based on depositional geometries, biogenic contents and lateral and vertical variations of facies, three depositional models are prop...
Competition between reef-building corals and benthic algae is of key importance for reef dynamics. These interactions occur on many spatial scales, ranging from chemical to regional. Using microprobes, 16S rDNA pyrosequencing and underwater surveys, we examined the interactions between the reef-building coral Montastraea annularis and four types of benthic algae. The macroalgae Dictyota bartayr...
Herbivores play an essential role in the health and recovery of a coral reef ecosystem. The lack keystone herbivore Diadema antillarum has had long‐lasting effects, evidenced with many reefs persisting algal dominance. This study restocked 756 lab‐reared D. to four on east south coast Puerto Rico. Sea urchins were placed experimental plots (“corrals”) for 2 months, change benthic composition wa...
Microatolls of coralline algal encrustations were discovered during a reconnaissance study of environments around Cozurnel Island, 14 miles off the northeast coast of the Yucatan Peninsula. Onehundred-sixteen of them were counted in one small area along the northeastern shore in a belt approximately 100 feet wide, 150 yards offshore, and parallel to shore. The microatolls are roughly circular w...
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