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This document is a compilation of scientific articles and journals that examine the effects of salinity and temperature on the physiological and biochemical responses of marine algae. The research explores how these stressors impact the growth, photosynthesis, antioxidant capacity, and other properties of various algae species. The findings highlight the adaptability and resilience of marine algae in the face of changing environmental conditions. This information is valuable for understanding the potential impacts of climate change on marine ecosystems and the ability of algae to respond to environmental stressors. [Extracted from the article]

Conspicuous tufts of the filamentous algae Polysiphonia Greville inhabit the reefs of Crassostrea gigas on the Atlantic Patagonian coast. The population was recorded for the first time in 1994 and identified as P. argentinica. This study exhaustively investigated the morphology and reproduction of specimens and the seasonality of the population. The results revealed the identity of the specimens as the invasive Japanese macroalga Polysiphonia morrowii Harvey, on the basis of several striking features: the setaceous and tufted thalli, the corymbose growing apices, the endogenous axillary branches, the urceolate cystocarps and the sharply pointed branches. Sexual reproduction was evidenced; however, fertile male gametophytes were absent in the samples. The population was found almost all year round, but its abundance became higher in autumn and winter. The present study constitutes the first record of this invasive macroalga on the South Atlantic Ocean; the fourth record of an exotic macroalgal species on the Atlantic Patagonian coast; and the first record of an invasive species related to the establishment of C. gigas in Atlantic Patagonia. [ABSTRACT FROM AUTHOR]

Three alien macrophytes, Ascophyllum nodosum, Colpomenia peregrina and Polysiphonia morrowii, are reported for the first time from the Mar Piccolo of Taranto (southern Italy, Mediterranean Sea). Two other species, Agardhiella subulata and Codium fragile subsp. fragile that were not, or were sporadically, detected in the basin since their first record in 1987 and 2002, respectively, were also recorded. In the Mar Piccolo, there appears to be a close link between establishment of alien species and the regular import of shellfish for direct sale. To limit the flow of accidental species introductions, a continuous and rigorous control of all the economic activities performed along the coast is recommended through the enforcement of effective laws and an early detection of new introductions. [ABSTRACT FROM AUTHOR]

Polysiphonia morrowii, a species native to the North Pacific, is believed to have been introduced to Chile, Turkey, Italy and France. This species was first recorded from New Zealand in 2011, based on collections made in 2004 from two sites on South Island, but no commentary was provided in the distribution or characteristics of the material collected. In 2009, as part of a study on macroalgae associated with soft sediment habitats in New Zealand, several samples of P. morrowii were collected from Otago Harbour, a location already known to host 17 non-indigenous macroalgal species. However, this species has gone unnoticed in New Zealand. We present the current understanding of the distribution of this species in New Zealand, and the distinguishing features of the specimens collected, to assist with biosecurity and monitoring programmes. Including this report of P. morrowii, there are now seven species of Polysiphonia and Neosiphonia that are regarded as non-indigenous in New Zealand. [ABSTRACT FROM AUTHOR]

Polysiphonia morrowii (Rhodomelaceae, Rhodophyta) is abundant in intertidal zones of the northwestern Pacific Ocean in spring, and has been introduced to the Mediterranean Sea. We collected specimens of this species from intertidal rocks in February in Punta Arenas, in southernmost Chile. Thalli were densely tufted, slender, and elongate, with four pericentral cells, no cortication and short tetrasporangial ultimate branchlets. The plastid protein-coding rbcL was analyzed from specimens collected in Chile and Korea, as well as from putative relatives. The rbcL sequences of the Chilean specimens were almost identical to those from Korea, and were clearly separated from other related taxa from Chile and other areas. These results suggest that P. morrowii has been introduced recently from the northwestern Pacific Ocean to Chile. [ABSTRACT FROM AUTHOR]