Geomorphometric Seabed Classification and Potential Megahabitat Distribution in the Amazon Continental Margin

Lavagnino, Ana Carolina; Bastos, Alex Cardoso; Filho, Gilberto M. Amado; Moraes, Fernando C.; Araujo, Laís S.; Moura, Rodrigo L.

doi:10.3389/fmars.2020.00190

Cited by 23 publications

(21 citation statements)

References 51 publications

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“…Considering the high level of cultural eutrophication of a large part of the coastlines, and taking into account the predicted increase of SST and heat waves frequency, our results highlight the intraspecific vulnerability to environmental changes of seagrass meadows and the importance of performing studies at a local scale. Unraveling intraspecific strategies and the role of local acclimation/adaptation in the response to multiple stressors could be crucial for seagrass conservation strategies under a climate change scenario (Duarte et al, 2018). It becomes fundamental to perform multifactorial experiments on seagrass populations from different environments, in order to understand their resilience to future local and global environmental changes and to support management strategies.…”

Section: Discussionmentioning

confidence: 99%

Does Warming Enhance the Effects of Eutrophication in the Seagrass Posidonia oceanica?

et al. 2020

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Seagrass meadows are disappearing at rates comparable to those reported for mangroves, coral reefs, and tropical rainforests. One of the main causes of their decline is the so-called cultural eutrophication, i.e., the input of abnormal amounts of nutrients derived from human activities. Besides the impact of eutrophication at a local scale, the occurrence of additional stress factors such as global sea warming may create synergisms in detriment of seagrass meadows’ health. In the present study, we aimed to evaluate if plants undergoing chronic cultural eutrophication and plants growing in relatively pristine waters are more (or less) sensitive to heat stress, nutrient load and the combination of both stressors. To address this question, a mesocosm experiment was conducted using Posidonia oceanica collected from two environments with different nutrients load history. Plants were exposed in controlled conditions to high nutrient concentrations, increased temperature and their combination for 5 weeks, to assess the effect of the single stressors and their interaction. Our results revealed that plants experiencing chronic cultural eutrophication (EU) are more sensitive to further exposure to multiple stressors than plants growing in oligotrophic habitats (OL). OL and EU plants showed different morphological traits and physiological performances, which corroborates the role of local pressures in activating different strategies in response to global environmental changes. EU-plants appeared to be weaker during the treatments, showing the greatest percentage of mortality, particularly under increased temperature. Temperature and nutrient treatments showed opposite effects when tested individually and an offset response when combined. The activation of physiological strategies with high energetic expenses to cope with excess of nutrients and other stressors, could affect plants present and future persistence, particularly under eutrophic conditions. Our results represent a step forward in understanding the complex interactions that occur in natural environments. Moreover, unraveling intraspecific strategies and the role of local acclimation/adaptation in response to multiple stressors could be crucial for seagrass conservation strategies under a climate change scenario.

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Section: Discussionmentioning

confidence: 99%

Does Warming Enhance the Effects of Eutrophication in the Seagrass Posidonia oceanica?

et al. 2020

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“…Применение метода усиленной регрессии дерева решений (предикторылокальные морфометрические величины) позволяет строить прогнозные карты распределения донных осадков с подразделением на иловую, песчаную и гравийную фракции [Misiuk et al, 2018]. Другой подход классификации рельефа, основанный на индексе относительного превышения, позволил составить прогнозные карты бентических местообитаний авандельты Амазонки [Lavagnino et al, 2020]…”

Section: зоогеографияunclassified

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2021

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Сборник включает материалы, представленные на Международную конференцию «ИнтерКарто. ИнтерГИС 27». В статьях рассматриваются теоретические и методические аспекты геоинформационного и картографического обеспечения экологических, экономических и социальных вопросов устойчивого развития, геоинформатики, картографии, создания атласов, дистанционного зондирования Земли. Также рассматриваются аспекты картографического и геоинформационного обеспечения решения вопросов общественного здоровья, сельского хозяйства и землепользования, туризма, природного и культурного наследия, исторической географии и географического образования. Сборник выпускается 1 раз в год, начиная с 1994 г.

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“…The climate change associated with sea level rise has increased the NUPPY realated to transport areas and sediment accumulation concentrated at mouths of rivers (Lavagnino et al, 2020). Studies on continental margins appear, where the methodologies are modified according to the purpose of each of them .…”

Section: Change Of Knowledge and The Evolution Of Canyons Studiesmentioning

confidence: 99%

“…The environmental characteristics are determined by their interactions with sediment input, rainfall regime, intensity and direction of winds and currents, water masses, and biological assemblages, affecting a high complexity region such as the Amazon River mouth (Figure 5A; Jegou et al, 2008;Lavagnino et al, 2020). The sediment distribution, as well as the flow dynamic in submarine canyons, are examples of how the flowtopography interaction is fundamental for the maintenance of these processes (Lorenzoni et al, 2012).…”

Section: Change Of Knowledge and The Evolution Of Canyons Studiesmentioning

confidence: 99%

“…Currently, several studies have been published about submarine canyons and their influence on the ocean and how a seabed feature is essential to provide a complex system amongst the geological (Fildani, 2017), physical (Aguiar et al, 2018), biological (Bernardino et al, 2019), and social (Uddin et al, 2021) processes. Submarine canyons studies aim to understand the association of each process that belongs to their system, increasing the overview on different study subjects as well as the specific locals present on continental margins, shelf-break, slope, or close to the rise areas in the ocean (Leynaud and Sultan, 2010;Callow et al, 2014;Lavagnino et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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The South American Advances in Submarine Canyons Studies and Their Link to the Ocean Decade

Silva¹,

Araújo²

2021

Front. Mar. Sci.

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Submarine canyons have a relevant role in marine ecosystems. They are responsible for oceanographic conditions such as variability of temperature and salinity, sediment transport, nutrients, and even pollutants amongst marine areas. Submarine canyon studies have been growing and reaching prominence due to their importance in the Blue Economy. Initiatives to promote sustainable development for the ocean have been discussed in the Ocean Decade. Although canyons studies are increasing, how can we integrate these with the Ocean Decade outcomes? Thus, we aim to demonstrate an overview of the advances of submarine canyons studies and their link to the Ocean Decade for South America. We analyzed 160 studies divided into spatiotemporal analysis and study approaches according to the Ocean Decade outcomes. We discuss these articles, building a timeline and argumentative topics considering the advances, and discuss gaps to predict the future of submarine canyons studies in the Ocean Decade and Blue Economy context.

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Geomorphometric Seabed Classification and Potential Megahabitat Distribution in the Amazon Continental Margin

Cited by 23 publications

References 51 publications

Does Warming Enhance the Effects of Eutrophication in the Seagrass Posidonia oceanica?

Does Warming Enhance the Effects of Eutrophication in the Seagrass Posidonia oceanica?

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The South American Advances in Submarine Canyons Studies and Their Link to the Ocean Decade

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