Scott C. Doney, Victoria J. Fabry, Richard A. Feely, Joan A. Kleypas
Rising atmospheric carbon dioxide (CO2), primarily from human fossil fuel
combustion, reduces ocean pH and causes wholesale shifts in seawater carbonate
chemistry. The process of ocean acidification is well documented in field data,
and the rate will accelerate over this century unless future CO2emissions are
curbed dramatically. Acidification alters seawater chemical speciation and
biogeochemical... hiện toàn bộ
Ocean warming and increased stratification of the upper ocean caused by global
climate change will likely lead to declines in dissolved O2 in the ocean
interior (ocean deoxygenation) with implications for ocean productivity,
nutrient cycling, carbon cycling, and marine habitat. Ocean models predict
declines of 1 to 7% in the global ocean O2 inventory over the next century, with
declines continuing... hiện toàn bộ
Clara Deser, Michael A. Alexander, Shang‐Ping Xie, Adam S. Phillips
Patterns of sea surface temperature (SST) variability on interannual and longer
timescales result from a combination of atmospheric and oceanic processes. These
SST anomaly patterns may be due to intrinsic modes of atmospheric circulation
variability that imprint themselves upon the SST field mainly via surface energy
fluxes. Examples include SST fluctuations in the Southern Ocean associated with
... hiện toàn bộ
Keryn B. Gedan, Brian R. Silliman, Mark D. Bertness
Salt marshes are among the most abundant, fertile, and accessible coastal
habitats on earth, and they provide more ecosystem services to coastal
populations than any other environment. Since the Middle Ages, humans have
manipulated salt marshes at a grand scale, altering species composition,
distribution, and ecosystem function. Here, we review historic and contemporary
human activities in marsh e... hiện toàn bộ
Donald M. Anderson, Allan Cembella, Gustaaf M. Hallegraeff
The public health, tourism, fisheries, and ecosystem impacts from harmful algal
blooms (HABs) have all increased over the past few decades. This has led to
heightened scientific and regulatory attention, and the development of many new
technologies and approaches for research and management. This, in turn, is
leading to significant paradigm shifts with regard to, e.g., our interpretation
of the ph... hiện toàn bộ
Plastics contamination in the marine environment was first reported nearly 50
years ago, less than two decades after the rise of commercial plastics
production, when less than 50 million metric tons were produced per year. In
2014, global plastics production surpassed 300 million metric tons per year.
Plastic debris has been detected worldwide in all major marine habitats, in
sizes from microns to... hiện toàn bộ
Estuaries are a major boundary in the land-ocean interaction zone where organic
carbon (OC) and nutrients are being processed, resulting in a high water-to-air
carbon dioxide (CO2) flux (∼0.25 Pg C y−1). The continental shelves, however,
take up CO2 (∼0.25 Pg C y−1) from the atmosphere, accounting for approximately
17% of open ocean CO2 uptake (1.5 Pg C y−1). It is demonstrated here that CO2
relea... hiện toàn bộ
Local adaptation in the sea was regarded historically as a rare phenomenon that
was limited to a handful of species with exceptionally low dispersal potential.
However, a growing body of experimental studies indicates that adaptive
differentiation occurs in numerous marine invertebrates in response to selection
imposed by strong gradients (and more complex mosaics) of abiotic and biotic
conditions... hiện toàn bộ
All communities are dominated by a few species that account for most of the
biomass and carbon cycling. On the other hand, a large number of species are
represented by only a few individuals. In the case of bacteria, these rare
species were until recently invisible. Owing to their low numbers, conventional
molecular techniques could not retrieve them. Isolation in pure culture was the
only way to ... hiện toàn bộ
Understanding the fate of terrestrial organic carbon (Corg) delivered to oceans
by rivers is critical for constraining models of biogeochemical cycling and
Earth surface evolution. Corg fate is dependent on both intrinsic
characteristics (molecular structure, matrix) and the environmental conditions
to which fluvial Corg is subjected. Three distinct patterns are evident on
continental margins supp... hiện toàn bộ