Short-term spatiotemporal biomarker changes in oysters transplanted to an anthropized estuary in Southern Brazil

Occluded fronts are naturally cyclogenic areas that have been intensified by global warming. Studies evaluating the effects of occluded fronts in the submerged aquatic vegetation (SAV) and its associated fauna in shallow estuarine areas may provide insights on the impacts of climate change-induced extreme weather events on coastal ecosystems functioning. The present dataset describes data on benthic fauna and flora in the Patos Lagoon Estuary (PLE), in southern Brazil, seasonally obtained during intense occluded fronts. Using a hierarchical sample design, based on Beyond BACI protocols (Before/After and Control/Impact), fauna and flora were sampled before and after four occluded fronts passage throughout 2019.Three habitats were sampled: SAV Meadow, SAV Edge and adjacent Sandflat. A total of 432 macrozoobenthic samples (216 samples for stratum); 216 samples for bellow and aboveground biomass, vegetation coverage, canopy height and marine macrophytes morphology; 144 samples by sedimentology and organic matter; 72 water column depth measurements; and 8 temperature and salinity measurements were collected during the study period. The data is available at the Global Biodiversity Information Facility (GBIF), in Darwin Core standard format (DwC), organized according to the OBIS-ENV-DATA model, with CC-BY-NC-4-0 license for use. The present dataset adds to the comprehension of the temporal variability of estuarine benthic communities in subtropical systems, and how short-term meteorological process can affect zoo and fitobenthic communities in the context of climate changes.

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Can short-term meteorological events alter subtropical estuarine macrobenthic assemblages in seagrass meadows (Patos Lagoon Estuary - Southern Brazil)?

Estuarine Coastal and Shelf Science ◽

10.1016/j.ecss.2021.107532 ◽

2021 ◽

pp. 107532

Author(s):

Dairana Misturini ◽

Leonir A. Colling

Keyword(s):

Southern Brazil ◽

Short Term ◽

Patos Lagoon ◽

Seagrass Meadows ◽

Macrobenthic Assemblages ◽

Patos Lagoon Estuary

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Estimation of soybean agronomic performance in climatic scenarios for Southern Brazil

Revista CERES ◽

10.1590/0034-737x201764060002 ◽

2017 ◽

Vol 64 (6) ◽

pp. 567-573

Author(s):

Rosandro Boligon Minuzzi ◽

Carolina do Amaral Frederico ◽

Thieres George Freire da Silva

Keyword(s):

Cycle Duration ◽

Climatic Data ◽

Agronomic Performance ◽

Southern Brazil ◽

Irrigation Requirement ◽

Medium Term ◽

Short Term ◽

Intergovernmental Panel ◽

Climatic Scenarios ◽

Use Efficiency

ABSTRACT The study aimed to analyze the agronomic performance of soybean cultivated in Southern Brazil, in climatic scenarios. Climatic data from three cities located in the main soybean producing regions of Paraná, Santa Catarina, and Rio Grande do Sul were used in the Aquacrop 4.0 software. Thus, it was possible to simulate cycle duration, yield, water use efficiency in productivity of evapotranspiration water (WUE), net irrigation requirement, and harvest index adjusted for different climatic scenarios based on short-term (2016-2035) and medium-term projections (2046-2065) of the RCP4.5 scenario of the Intergovernmental Panel on Climate Change. The soybean cycle duration tends to decrease when the locality is colder. Productivity and WUE should increase even if there is no irrigation requirement in future climate scenarios.

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Sedimentação de Longo e Curto Período na Lagoa dos Patos, Sul do Brasil

Pesquisas em Geociências ◽

10.22456/1807-9806.19516 ◽

2006 ◽

Vol 33 (2) ◽

pp. 79 ◽

Cited By ~ 12

Author(s):

ELÍRIO TOLDO JR ◽

SERGIO DILLENBURG ◽

IRAN CORRÊA ◽

LUIZ ALMEIDA ◽

JAIR WESCHENFELDER ◽

...

Keyword(s):

Coastal Plain ◽

Average Rate ◽

Stratigraphic Correlation ◽

Sedimentation Rates ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Short Term ◽

European Colonization ◽

Reflecting Surface

Lagoa dos Patos in southern Brazil is part of the largest lagoonal system in South America. The Holocene lagoonal sediments of the Lagoa dos Patos, mostly muds, have an average thickness of about 6 m as determined by 297 km of 7.0 kHz echograms. Holocene muddy sedimentation developed over a probable Upper Pleistocene coastal plain, whose surface has a subbottom reflector that could not be penetrated by the energy of a 7.0 kHz seismic wave. The characteristics of this reflecting surface suggest indurated Pleistocene muds and/or sediments that are coarser than the overlying muddy deposits of Holocene lagoon. Based on stratigraphic correlation and the local sea level curve, we estimate that Holocene sedimentation started about 8.0 ka ago. This yields an average deposition rate of 0.75 mm/yr. A broadly comparable average rate of 0.52 ± mm/yr was obtained for cored intervals between 14C samples from the upper part of these muddy Holocene lagoon deposits. These long-term sedimentation rates are much slower than rates based on two determinations of 210Pb for surface muds deposits in the last 150 years, which yielded values of 3.5 and 8.3 mm/yr. Quite possibly the high short-term rates may be the result of more rapid lagoonal sedimentation related to deforestation of the watershed of the lagoon and other impact types related with human activities during the 150 years of European colonization in the Rio Grande do Sul state. Also, the aim of this study is to identify present and possible future environmental problems related with high lagoonal sedimentation rates such as the water quality, port dredge and the presence of mud deposits on the oceanic beach.

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Soil carbon sequestration and stocks: short-term impact of maize succession to cover crops in Southern Brazil Inceptisol

Spanish Journal of Agricultural Research ◽

10.5424/sjar/2020183-16255 ◽

2020 ◽

Vol 18 (3) ◽

pp. e0304

Author(s):

Jorge L. Locatelli ◽

Felipe Bratti ◽

Ricardo H. Ribeiro ◽

Marcos R. Besen ◽

Eduardo Brancaleoni ◽

...

Keyword(s):

Cover Crops ◽

Red Clover ◽

No Tillage ◽

Annual Ryegrass ◽

Southern Brazil ◽

Short Term ◽

C Stocks ◽

Winter Cover ◽

Winter Cover Crops ◽

Soc Stocks

Aim of study: To evaluate soil organic carbon (SOC) sequestration and stock over the succession of maize to winter cover crops under a short-term no-tillage system.Area of study: A subtropical area in Southern Brazil.Material and methods: The experiment was implemented in 2013. The treatments were: seven winter cover crops single cultivated (white-oats, black-oats, annual-ryegrass, canola, vetch, fodder-radish and red-clover); an intercropping (black-oats + vetch); and a fallow, with maize in succession. Soil samples were collected after four years of experimentation, up to 0.60 m depth, for SOC determination.Main results: SOC stocks at 0-0.6 m depth ranged from 96.2 to 107.8 t/ha. The SOC stocks (0-0.60 m depth) were higher under vetch and black-oats, with an expressive increase of 23 and 20% for C stocks in the 0.45-0.60 m layer, compared to fallow. Thus, SOC sequestration rates (0-0.60 m depth), with vetch and black oats, were 1.68 and 0.93 t/ha·yr, respectively.Research highlights: The establishment of a high-quality and high C input cover crops in the winter, as vetch or black-oats in succession to maize, are able to increase SOC stocks, even in the short term.

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Biopsy darting of common bottlenose dolphins (Tursiops truncatus) in southern Brazil: evaluating effectiveness, short-term responses and wound healing

Latin American Journal of Aquatic Mammals ◽

10.5597/lajam00221 ◽

2017 ◽

Vol 11 (1-2) ◽

pp. 121-132 ◽

Cited By ~ 4

Author(s):

Pedro Friedrich Fruet ◽

Luciano Dalla Rosa ◽

Rodrigo C. Genoves ◽

Victor H. Valiati ◽

Thales R.O. De Freitas ◽

...

Keyword(s):

Wound Healing ◽

Tursiops Truncatus ◽

Local Level ◽

Bottlenose Dolphins ◽

Previous Attempt ◽

Southern Brazil ◽

Short Term ◽

Patos Lagoon ◽

Multiple Biopsy ◽

Sampling Effectiveness

Cetacean biopsy sampling is a widely used technique with undisputable scientific value. Although it is generally considered as a harmless technique with no apparent long-lasting effects, studies have recommended examining behavioral responses to evaluate potential impacts on individuals, groups and sampled populations. In this study, we evaluated individual behavioral reactions and wound-healing in common bottlenose dolphins (Tursiops truncatus) during a biopsy sampling program carried out in southern Brazil from 2003 to 2012, and compared sampling effectiveness between dedicated and opportunistic sampling surveys. Two hundred and fiftytwo biopsy attempts were made, resulting in 118 hits (48% of attempts) and 134 samples (52% of attempts) collected successfully. Responses to biopsy sampling were low-level, of short-term duration, and elicited similar reactions on the dolphins, irrespective of shot distance, sex of individuals, dolphins’ group size and pre-behavioral state. Dolphins subjected to multiple biopsy attempts reacted in a similar manner as in previous attempt(s), with no evidence of increasing the intensity of the reaction. Wounds could be monitored in 18 animals and healed over 18 to 35 days. Generally, wounds appeared to be covered by epidermis in about three weeks with no observed signs of skin infection. Our results agree with previous studies suggesting that biopsy sampling does not cause significant disturbance to the behavior of dolphins. At a local level, this study demonstrates that biopsy sampling of bottlenose dolphins in the Patos Lagoon Estuary is more effective, less costly and less intrusive when conducted opportunistically, but that long-term sampling is required to achieve a relatively good sample size from photoidentified individuals in the population.

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