Thus, shoreline emergent vegetation is the primary food available for the local manatee population. Consequently, our model demonstrated that despite nutrient enrichment, less than 5% of the lake bottom surface sustained submerged aquatic vegetation. Further analysis suggests that the poor transparency of the lake is not associated with chlorophyll concentrations but rather with the suspended sediments brought-in by the Sanaga River. The decreasing nutrient gradient moving from the mouth of the lake (in the south) to the north indicates that the flow of the adjacent Sanaga River is the primary source of nutrient input. Results indicate that Lake Ossa’s trophic state parameters doubled in only three decades (from 1985 to 2016), moving from a mesotrophic to a eutrophic state. These parameters were then compared with historical values obtained from the literature to examine the dynamic trophic state of Lake Ossa. Aquatic biotic and abiotic parameters including water clarity, nitrogen, phosphorous, and chlorophyll concentrations were measured monthly during four months at each of 18 water sampling stations evenly distributed across the lake. Little information exists on the water quality and health of the ecosystem as reflected by its chemical and biological characteristics. Lake Ossa is known as a refuge for the threatened African manatees in Cameroon. The present study aims at investigating the past and current trophic status of Lake Ossa and evaluating its potential impact on African manatee health. sl2, acoustics, BioBase, Bottom, citizen science, coastal, coastal mapping, crowd sourcing, EcoSound, guest blog, habitat, hardness, monitoring, seagrass mapping, sedimentation Tags Australia, benthic, Bryozoans, Coastal, Corals, genesis, Lowrance, mapping, Simrad, social map, sonar 1 Comment on Social mapping of Australian bays and conservation of Fish Aggregating Bryozoans Lowrance and BioBase informing Manatee Conservation in Lake Ossa, Cameroon Africa Figure 1: Underwater imagery of the bryozoan reefs revealed remarkable biogenic reef structures with abundant invertebrate life surrounded by large areas of bare sediment.Ĭontinue reading “Social mapping of Australian bays and conservation of Fish Aggregating Bryozoans” Author biobasemaps Posted on OctoOctoCategories.
Here, bryozoans, skeleton-forming filter-feeding organisms also known as ‘lace corals’, form expansive areas of reef that support a high diversity and abundance of macroinvertebrates important to snapper and other prized recreational fish species. The waters of Western Port in southeastern Australia are a recreational fishing haven and hidden beneath its turbid waters, a unique fragile seafloor community has been newly described. (b) Senior Lecturer at La Trobe University Department of Ecology, Environment, and Evolution. (a) Marine Ecologist and Director at Fathom Pacific Social mapping of Australian bays and conservation of Fish Aggregating Bryozoans
#MAKING LOWRANCE MAPS INSTALL#
Modelers have heard it said many times (sometimes in more colorful language), the quality of the output depends on the quality of the input.Ĭontinue reading “Properly install your Lowrance/Simrad transducer and mapping is easy with BioBase.” Author biobasemaps Posted on DecemDecemCategories installation, transducer, Uncategorized Tags Acoustic, Coastal Mapping, Lake Mapping, Lowrance, seagrass, Simrad, sonar, Vegetation Leave a comment on Properly install your Lowrance/Simrad transducer and mapping is easy with BioBase. If the transducer is not properly placed on the boat or not at the appropriate angle, your BioBase outputs could be inaccurate. The importance of proper transducer installation cannot be overstated. However, one of the most frequently overlooked parts of this equation is careful attention to the proper installation of the transducer sensor that is pinging the bottom and collecting all the information below the boat. Algorithms on remote servers do the rest of the work.
#MAKING LOWRANCE MAPS PC#
Record your sonar while out on the water to a microSD card, plug the card into your PC back at the office, log into your BioBase account and upload. For the user, the process of converting volumes of raw sonar and gps signals into an intuitive map is easy and requires very little input upfront. Aquatic Biologist and BioBase Product ExpertīioBase’s EcoSound is a powerful cloud platform for creating high definition lake or coastal maps of depth, aquatic vegetation (or seagrass), and bottom hardness from Lowrance® and Simrad®