Two-year temporal response of benthic macrofauna and sediments
... and its effects on benthic macrofauna have been done in tropical marine ecosystems. This study describes the temporal response of the water column, sediments and macrofauna to seasonal hypoxia in a semi-enclosed bay (Cienfuegos, Caribbean Sea). The Calisito site was sampled monthly from June 2010 un ...
... and its effects on benthic macrofauna have been done in tropical marine ecosystems. This study describes the temporal response of the water column, sediments and macrofauna to seasonal hypoxia in a semi-enclosed bay (Cienfuegos, Caribbean Sea). The Calisito site was sampled monthly from June 2010 un ...
Why are there so many jellyfish in our rivers? A Case
... 2. Changes in the salinity in the bay can shift the distribution of jellies in the bay, as some jellies, including sea nettles, have a “narrow” salinity tolerance. Examples of factors that can cause largescale changes in salinity include weather conditions, increased potable water use, and large off ...
... 2. Changes in the salinity in the bay can shift the distribution of jellies in the bay, as some jellies, including sea nettles, have a “narrow” salinity tolerance. Examples of factors that can cause largescale changes in salinity include weather conditions, increased potable water use, and large off ...
Meso- and bathypelagic fish interactions with seamounts and mid
... maximum' of organic matter often detected around 500 m (Walsh et al., 1988), the average day time depth of most deep-scattering layers (DSL). Our understanding of the dynamics and the magnitude of the fluxes in these processes is incomplete, but improving (Ducklow et al., 2001; Buesseler et al., 200 ...
... maximum' of organic matter often detected around 500 m (Walsh et al., 1988), the average day time depth of most deep-scattering layers (DSL). Our understanding of the dynamics and the magnitude of the fluxes in these processes is incomplete, but improving (Ducklow et al., 2001; Buesseler et al., 200 ...
Common large-scale responses to climate and fishing across
... (RV) surveys are designed to monitor the distribution and abundance of commercial and non-commercial species. The US conducts annual multispecies surveys in spring and autumn, but we used just the autumn time-series for this study. The US surveys use a #36 Yankee (or similar) bottom trawl towed at ...
... (RV) surveys are designed to monitor the distribution and abundance of commercial and non-commercial species. The US conducts annual multispecies surveys in spring and autumn, but we used just the autumn time-series for this study. The US surveys use a #36 Yankee (or similar) bottom trawl towed at ...
Fishing Down Aquatic Food Webs
... Figure 1. Overview of the Tsukiji fish market in Tokyo hints at the variety of offerings available to seafood lovers. But the mix of species being caught and sold around the world will probably not remain as rich as it is today. The authors have determined that the output of global fisheries—and pre ...
... Figure 1. Overview of the Tsukiji fish market in Tokyo hints at the variety of offerings available to seafood lovers. But the mix of species being caught and sold around the world will probably not remain as rich as it is today. The authors have determined that the output of global fisheries—and pre ...
Short-term changes of protozoan control on autotrophic
... for 10 min for each sample in a liquid scintillation counter (Beckman'" LS 6000 IC). The number of newly produced bacterial cells was estimated from thymidine uptake using a conversion factor of 2 x 10'" cells mol"' thymidine (Bell, 1990). Protozoan abundance, biomass and grazing experiments To quan ...
... for 10 min for each sample in a liquid scintillation counter (Beckman'" LS 6000 IC). The number of newly produced bacterial cells was estimated from thymidine uptake using a conversion factor of 2 x 10'" cells mol"' thymidine (Bell, 1990). Protozoan abundance, biomass and grazing experiments To quan ...
University of Groningen Production by intertidal benthic
... of free-living individuals at different hmes of the year and at different physiological states; average energetic values of the food types; and digestive efficiencies. This kind of estimate of predatory impact is clearly very susceptible to inaccuracies in the assumptions, and requires extensive dat ...
... of free-living individuals at different hmes of the year and at different physiological states; average energetic values of the food types; and digestive efficiencies. This kind of estimate of predatory impact is clearly very susceptible to inaccuracies in the assumptions, and requires extensive dat ...
Supporting Information Legends to Fig. S1, Table S1 and
... measuring arm is attached to a benchmark rod and leveled; pins are lowered to the soil surface and the distance above the arm is recorded on each measurement date. (b) Close-up of pins resting on the soil surface. (c) A core showing accretion of sediment and organic material above a marker horizon o ...
... measuring arm is attached to a benchmark rod and leveled; pins are lowered to the soil surface and the distance above the arm is recorded on each measurement date. (b) Close-up of pins resting on the soil surface. (c) A core showing accretion of sediment and organic material above a marker horizon o ...
Survival Strategies of the Rotifer Brachionus rotundiformis - E-FAS
... these experimental conditions. The presence of the rotifer did not influence the population growth of the copepods, likely because of the large size differential between B. rotundiformis (c. 02 mm) and A. borneoensis (c. 0.8 mm). However, the copepod suppressed rotifer population growth after 10 day ...
... these experimental conditions. The presence of the rotifer did not influence the population growth of the copepods, likely because of the large size differential between B. rotundiformis (c. 02 mm) and A. borneoensis (c. 0.8 mm). However, the copepod suppressed rotifer population growth after 10 day ...
Venerupis philippinarum, Japanese littleneck clam
... a suitable substrate to settle on. The substrate is usually a muddy, sandy, or soft surface the clam can burrow into with its foot. Burrowing into the ground allows the animal to find food and be ...
... a suitable substrate to settle on. The substrate is usually a muddy, sandy, or soft surface the clam can burrow into with its foot. Burrowing into the ground allows the animal to find food and be ...
ktf0371 - OceanDocs Home
... tolernnce is comparatively low, about 20-25 ppt (Watanabe et aI., 1985a)Similarly the physiological responses to 0. niloticus to saltwater have been evaluated by Morgan et al. (1997). Fish reared in freshwater were transferred to freshwater, isotonic salinity (ISO 12%0) and 75%0 seawater (25%0) and ...
... tolernnce is comparatively low, about 20-25 ppt (Watanabe et aI., 1985a)Similarly the physiological responses to 0. niloticus to saltwater have been evaluated by Morgan et al. (1997). Fish reared in freshwater were transferred to freshwater, isotonic salinity (ISO 12%0) and 75%0 seawater (25%0) and ...
current research, monitoring, and education
... Investigators at three U.S. east coast sites where ichthyoplankton (larval fish) have been regularly collected for at least 25 years are working together with state and regional fishery management groups to make those long-term data available for use in managing fisheries species stocks. The North I ...
... Investigators at three U.S. east coast sites where ichthyoplankton (larval fish) have been regularly collected for at least 25 years are working together with state and regional fishery management groups to make those long-term data available for use in managing fisheries species stocks. The North I ...
Climate change alters the structure of arctic marine food webs due to
... From a network perspective, the ecological role of a species is a direct result of its position in the food web, the number of interactions it has with neighbouring species and their interactions, and also the strength of these interactions [13,14]. Some species are functionally more important than ...
... From a network perspective, the ecological role of a species is a direct result of its position in the food web, the number of interactions it has with neighbouring species and their interactions, and also the strength of these interactions [13,14]. Some species are functionally more important than ...
Climate change alters the structure of arctic marine food webs due to
... From a network perspective, the ecological role of a species is a direct result of its position in the food web, the number of interactions it has with neighbouring species and their interactions, and also the strength of these interactions [13,14]. Some species are functionally more important than ...
... From a network perspective, the ecological role of a species is a direct result of its position in the food web, the number of interactions it has with neighbouring species and their interactions, and also the strength of these interactions [13,14]. Some species are functionally more important than ...
1 RELATIVE ABUNDANCE, GROWTH, AND MORTALITY OF FIVE
... abundance was not significantly related to changes in river discharge. Instantaneous daily growth estimates were positively related to river discharge for all species except spotted seatrout, for which a negative correlation was found. Instantaneous daily mortality estimates were positively correlat ...
... abundance was not significantly related to changes in river discharge. Instantaneous daily growth estimates were positively related to river discharge for all species except spotted seatrout, for which a negative correlation was found. Instantaneous daily mortality estimates were positively correlat ...
SP10 - Miss S. Harvey
... The abiotic factors in the kelp beds would include (among others) the water temperature, the currents, and factors such as an oil spill. Abiotic and biotic factors are connected to each other (Figure 2). As organisms live, they alter the environment around them, which in turn affects the organisms. ...
... The abiotic factors in the kelp beds would include (among others) the water temperature, the currents, and factors such as an oil spill. Abiotic and biotic factors are connected to each other (Figure 2). As organisms live, they alter the environment around them, which in turn affects the organisms. ...
Linking community and ecosystem dynamics through spatial
... two food webs are coupled through the movement of an agent, the coupling may be due to the traits (e.g. interaction coefficients among species or dispersal rates) and ⁄ or the material ⁄ energy of the shared agent. The second axis concerns the rates and scales of the coupling agents (the grain). In ...
... two food webs are coupled through the movement of an agent, the coupling may be due to the traits (e.g. interaction coefficients among species or dispersal rates) and ⁄ or the material ⁄ energy of the shared agent. The second axis concerns the rates and scales of the coupling agents (the grain). In ...
Food Web Assembly at the Landscape Scale: Using Stable
... These authors have shown that food webs are composed of different energy channels based on discrete resources, which are often not homogeneously spread in space and time, thus influencing the different components of the food web in their own way. Moreover, spatial interactions among neighboring ecos ...
... These authors have shown that food webs are composed of different energy channels based on discrete resources, which are often not homogeneously spread in space and time, thus influencing the different components of the food web in their own way. Moreover, spatial interactions among neighboring ecos ...
Management of Kachemak Bay Salmon
... Kackemak Bay is a 64 kilometer-long Bay off of Cook Inlet containing many diverse habitats. On the southern side of the bay there are several mountains. The northern side of the bay consists mostly of sedimentary rock, with a few cliffs and a bluff. Behind the string of mountains on the southern per ...
... Kackemak Bay is a 64 kilometer-long Bay off of Cook Inlet containing many diverse habitats. On the southern side of the bay there are several mountains. The northern side of the bay consists mostly of sedimentary rock, with a few cliffs and a bluff. Behind the string of mountains on the southern per ...
Habitat Use by Juvenile Salmonids in the Smith River Estuary
... We sought to understand how juvenile salmonids use the Smith River estuary, a system largely devoid of the tidal slough habitat it once contained. We further wanted to describe (1) the habitats used by juvenile salmonids, (2) whether differences in habitat use existed between species, and (3) the ro ...
... We sought to understand how juvenile salmonids use the Smith River estuary, a system largely devoid of the tidal slough habitat it once contained. We further wanted to describe (1) the habitats used by juvenile salmonids, (2) whether differences in habitat use existed between species, and (3) the ro ...
Eds., K. Omori, X. Guo, N. Yoshie, N. Fujii, I.... © by TERRAPUB, 2011.
... Fisheries (DAFF) between 2008 and 2010. Sardine, anchovy, round herring, chub and horse mackerels, squid and hakes were collected from either midwater or demersal trawls, and blue and mako shark were collected via long-lining. Table 1 shows the number of stations sampled, the date and season of samp ...
... Fisheries (DAFF) between 2008 and 2010. Sardine, anchovy, round herring, chub and horse mackerels, squid and hakes were collected from either midwater or demersal trawls, and blue and mako shark were collected via long-lining. Table 1 shows the number of stations sampled, the date and season of samp ...
KILHAM, PETER, AND ROBERT E. HECKY. Comparative ecology of
... Kilham 1978) and work well for many nutrients. Marine ecologists prefer Droop experiments over Monod experiments because for nitrogen and many other nutrients the cell quota (Q) is easy to measure even if the Droop equation is sometimes difficult to apply. As pointed out above, the Monod equation ca ...
... Kilham 1978) and work well for many nutrients. Marine ecologists prefer Droop experiments over Monod experiments because for nitrogen and many other nutrients the cell quota (Q) is easy to measure even if the Droop equation is sometimes difficult to apply. As pointed out above, the Monod equation ca ...
TESTIMONY OF D R RUSS BROWN, D R ... AND WARREN SHAUL USE OF HISTORICAL DAILY DATA FOR DELTA WATER Jones
... operations on observed fisheries responses. These are termed "descriptive" models. These descriptive models use historical Delta daily data as inputs and for testing the results. The second group of analytical tools simulates the expected effects of projected future Delta environmental conditions an ...
... operations on observed fisheries responses. These are termed "descriptive" models. These descriptive models use historical Delta daily data as inputs and for testing the results. The second group of analytical tools simulates the expected effects of projected future Delta environmental conditions an ...
Name of indicator 3.10 Zooplankton mean size vs. total stock (MSTS)
... The indicator is based on the idea that the mean size of zooplankton and the biomass or abundance, when examined together, provide more information than when the parameters are considered separately. Abundant zooplankton with a high mean size would indicate good feeding conditions for zooplanktivoro ...
... The indicator is based on the idea that the mean size of zooplankton and the biomass or abundance, when examined together, provide more information than when the parameters are considered separately. Abundant zooplankton with a high mean size would indicate good feeding conditions for zooplanktivoro ...
What can be done to prevent seagrass loss?
... fossil fuels. Urban and industrial sewage must be diverted to sewage treatment plants with efficient means of nutrient removal (Fig. 11.1). The techniques are well known but investments and running costs are high. Similarly, efficient reduction of agricultural runoff requires major, integrated remed ...
... fossil fuels. Urban and industrial sewage must be diverted to sewage treatment plants with efficient means of nutrient removal (Fig. 11.1). The techniques are well known but investments and running costs are high. Similarly, efficient reduction of agricultural runoff requires major, integrated remed ...
Ecology of the San Francisco Estuary
The San Francisco Estuary together with the Sacramento-San Joaquin River Delta represents a highly altered ecosystem. The region has been heavily re-engineered to accommodate the needs of water delivery, shipping, agriculture, and most recently, suburban development. These needs have wrought direct changes in the movement of water and the nature of the landscape, and indirect changes from the introduction of non-native species. New species have altered the architecture of the food web as surely as levees have altered the landscape of islands and channels that form the complex system known as the Delta.This article deals particularly with the ecology of the low salinity zone (LSZ) of the estuary. Reconstructing a historic food web for the LSZ is difficult for a number of reasons. First, there is no clear record of the species that historically have occupied the estuary. Second, the San Francisco Estuary and Delta have been in geologic and hydrologic transition for most of their 10,000 year history, and so describing the ""natural"" condition of the estuary is much like ""hitting a moving target"". Climate change, hydrologic engineering, shifting water needs, and newly introduced species will continue to alter the food web configuration of the estuary. This model provides a snapshot of the current state, with notes about recent changes or species introductions that have altered the configuration of the food web. Understanding the dynamics of the current food web may prove useful for restoration efforts to improve the functioning and species diversity of the estuary.