Global climate changes over time shape the environmental niche distribution of Octopus insularis in the Atlantic Ocean

2020 ◽  
Vol 652 ◽  
pp. 111-121
Author(s):  
FD Lima ◽  
LE Ángeles-González ◽  
TS Leite ◽  
SMQ Lima
Keyword(s):  
Atlantic Ocean ◽  
Geographic Distribution ◽  
Global Climate ◽  
Seawater Temperature ◽  
Trophic Chain ◽  
Future Scenarios ◽  
Climatic Niche ◽  
Distribution Ranges ◽  
Climatic Scenarios ◽  
Over Time

In the Atlantic Ocean, Octopus insularis (Cephalopoda: Octopodidae) Leite and Haimovici, 2008 inhabits warm and shallow habitats, where it is one of the main targets of cephalopod fisheries. Considering the current trend of increasing seawater temperature, warm-water species are expected to expand their geographic distribution ranges. Ecological niche modeling (ENM) is an important tool to help describe likely changes in geographic distribution patterns of a species in different climatic scenarios. To evaluate changes in the distribution of Octopus insularis over time, the maximum entropy approach was used, which estimated a suitable climatic niche for Octopus under 5 scenarios of global climate change. Four environmental variables were chosen to model the suitable climatic niche of O. insularis in the present, past, and future scenarios. The ENM in different climatic scenarios showed good validation and pointed out an increase of the suitable niche for O. insularis settlement, from the Last Glacial Maximum (21 kya) up to future scenarios. In the future projections, suitable niche space will potentially increase in the tropical Atlantic compared to the current distribution. Modeling pointed out the possibility of expansion from the current range of the species to the temperate northern Atlantic, temperate South America, and temperate South Africa. This may cause potential threats, such as possible extinction of endemic species, habitat displacement of native octopuses, and reorganizations in the trophic chain.

Global climate changes over time shaping the environmental niche distribution of Octopus insularis (Cephalopoda: Octopodidae) in the Atlantic Ocean

2020 ◽  
Author(s):  
Françoise D Lima ◽  
Luis Enrique Ángeles-González ◽  
Tatiana S Leite ◽  
Sergio MQ Lima
Keyword(s):  
Atlantic Ocean ◽  
Geographic Distribution ◽  
Climate Changes ◽  
Global Climate ◽  
Trophic Chain ◽  
Future Scenarios ◽  
Climatic Niche ◽  
Global Climate Changes ◽  
Climatic Scenarios ◽  
Over Time

In the Atlantic Ocean, Octopus insularis Leite and Haimovici, 2008 inhabits warm and shallow habitats, where it is one of the main targets of cephalopod fisheries. Considering the current trend of increase of increasing sea-water temperature, warm-water species are expected to expand their geographic distribution range. Ecological niche modeling (ENM) is an important tool to help describe likely changes in geographic distribution patterns of a species in many climatic scenarios. To evaluate the changes of O. insularis distribution over time, the Maximum Entropy approach was used, which estimated a suitable climatic niche for Octopus under five scenarios of global climate changes. Six environmental layers were chosen to model the modern suitable climatic niche of O. insularis and four variables were used for past and future scenarios. The ENM in different climatic scenarios showed good validation and pointed out an increase of the suitable niche for O. insularis settlement, from Last Glacial Maximum (21 Kya) up to future scenarios. In the future projections, the availability of species suitable niche will potentially increase in Tropical Atlantic compared to the current distribution. In addition, the modeling pointed out the possibility of an expansion from the species current range to Temperate Northern Atlantic, Temperate South America, and Temperate South Africa. This may cause potential threats, such as possible extinction of endemic species, habitat displacement of native octopuses, reorganizations in the trophic chain.

Geographic distribution of global climate zones under future scenarios

2017 ◽  
Vol 37 (12) ◽  
pp. 4327-4334 ◽  
Author(s):  
Xianliang Zhang ◽  
Xiaodong Yan ◽  
Zhenju Chen
Keyword(s):  
Geographic Distribution ◽  
Global Climate ◽  
Future Scenarios ◽  
Climate Zones

scholarly journals Geographic disparities and socio-demographic predictors of pertussis risk in Florida

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11902
Author(s):  
Corinne B. Tandy ◽  
Agricola Odoi
Keyword(s):  
Resource Allocation ◽  
High Risk ◽  
Geographic Distribution ◽  
Temporal Changes ◽  
County Level ◽  
Spatial Clusters ◽  
Geographic Disparities ◽  
Demographic Predictors ◽  
Time Period ◽  
Over Time

Background Pertussis is a toxin-mediated respiratory illness caused by Bordetella pertussis that can result in severe complications and death, particularly in infants. Between 2008 and 2011, children less than 3 months old accounted for 83% of the pertussis deaths in the United States. Understanding the geographic disparities in the distribution of pertussis risk and identifying high risk geographic areas is necessary for guiding resource allocation and public health control strategies. Therefore, this study investigated geographic disparities and temporal changes in pertussis risk in Florida from 2010 to 2018. It also investigated socioeconomic and demographic predictors of the identified disparities. Methods Pertussis data covering the time period 2010–2018 were obtained from Florida HealthCHARTS web interface. Spatial patterns and temporal changes in geographic distribution of pertussis risk were assessed using county-level choropleth maps for the time periods 2010–2012, 2013–2015, 2016–2018 and 2010–2018. Tango’s flexible spatial scan statistics were used to identify high-risk spatial clusters which were displayed in maps. Ordinary least squares (OLS) regression was used to identify significant predictors of county-level risk. Residuals of the OLS model were assessed for model assumptions including spatial autocorrelation. Results County-level pertussis risk varied from 0 to 116.31 cases per 100,000 people during the study period. A total of 11 significant (p < 0.05) spatial clusters were identified with risk ratios ranging from 1.5 to 5.8. Geographic distribution remained relatively consistent over time with areas of high risk persisting in the western panhandle, northeastern coast, and along the western coast. Although county level pertussis risks generally increased from 2010–2012 to 2013–2015, risk tended to be lower during the 2016–2018 time period. Significant predictors of county-level pertussis risk were rurality, percentage of females, and median income. Counties with high pertussis risk tended to be rural (p = 0.021), those with high median incomes (p = 0.039), and those with high percentages of females (p < 0.001). Conclusion There is evidence that geographic disparities exist and have persisted over time in Florida. This study highlights the application and importance of Geographic Information Systems (GIS) technology and spatial statistical/epidemiological tools in identifying areas of highest disease risk so as to guide resource allocation to reduce health disparities and improve health for all.

scholarly journals Paleotemperature and paleosalinity evolution across Eocene-Oligocene Transition in North Atlantic Ocean: Insights from geochemical analysis of bivalve shells.

2020 ◽  
Author(s):  
Justine Briard ◽  
Marc de Rafélis ◽  
Emmanuelle Vennin ◽  
Mathieu Daëron ◽  
Valérie Chavagnac ◽  
...  
Keyword(s):  
Atlantic Ocean ◽  
Sea Level ◽  
Environmental Changes ◽  
North Atlantic Ocean ◽  
Global Climate ◽  
Ice Sheet ◽  
Major Step ◽  
Mode Identification ◽  
Global Climate Changes ◽  
Bivalve Shells

&lt;p&gt;The Cenozoic period encompasses the last transition from the &amp;#8220;greenhouse&amp;#8221; climate of the late Early Eocene (~50 Ma) to our modern &amp;#8220;icehouse&amp;#8221; climate with its much lower CO&lt;sub&gt;2&lt;/sub&gt; levels, significant polar glaciation and major sea level drop. The Eocene-Oligocene transition (EOT), that marks the first major ice-sheet build-up on Antarctica, has been extensively studied as it represents the entrance into an icehouse mode. Identification of this major step of Antarctic ice-sheet build-up strongly relies on &amp;#948;&lt;sup&gt;18&lt;/sup&gt;O and Mg/Ca benthic foraminifera records from ODP / DSDP sites. By contrast, few records currently exist from coastal environments despite the presence of abundant fossil archives, like bivalve shells. Yet palaeoenvironmental records from these peculiar coastal sites could bring information on how they react to global climate changes and help to further understand the behavior of our climate system. In this study, we applied a multi-proxy strategy coupling &amp;#948;&lt;sup&gt;18&lt;/sup&gt;O, &amp;#948;&lt;sup&gt;13&lt;/sup&gt;C, clumped isotopes (&amp;#916;&lt;sub&gt;47&lt;/sub&gt;), strontium isotopes (&lt;sup&gt;87&lt;/sup&gt;Sr/&lt;sup&gt;86&lt;/sup&gt;Sr) analyses on aragonitic and calcitic bivalves and sediments recovered from the Isle of Wight (London-Paris Basin, Northeastern Atlantic Ocean) to provide additional constrain on environmental changes in this region across the Eocene-Oligocene Transition (~37.8&amp;#8211;33 Ma).&lt;/p&gt;&lt;p&gt;Our new coupled &amp;#948;&lt;sup&gt;18&lt;/sup&gt;O and &amp;#916;&lt;sub&gt;47 &lt;/sub&gt;dataset highlights a marked decrease in local seawater temperatures (~ 8&amp;#176;C) coupled to a drop in local seawater &amp;#948;&lt;sup&gt;18&lt;/sup&gt;O, likely linked to the sea level drop associated with ice-cap formation and an evolution toward more proximal, brackish environment in this region (that is apparent from sediment facies evolution). We estimate the salinity decrease recorded at the local scale from the Eocene to the Oligocene as reaching about 6 PSU, from 31 to 25 PSU. Strontium isotope analyses of the bivalves support this interpretation, showing values close to that of seawater up to the EOT but a marked deviation from contemporaneous global seawater &lt;sup&gt;87&lt;/sup&gt;Sr/&lt;sup&gt;86&lt;/sup&gt;Sr values toward more radiogenic values afterward. This positive deviation is in agreement with an evolution toward more proximal environments, subjected to larger freshwater inputs.&lt;/p&gt;

scholarly journals Evidence of cryptic species in the blenniid Cirripectes alboapicalis species complex, with zoogeographic implications for the South Pacific

ZooKeys ◽  
2018 ◽  
Vol 810 ◽  
pp. 127-138 ◽  
Author(s):  
Erwan Delrieu-Trottin ◽  
Libby Liggins ◽  
Thomas Trnski ◽  
Jeffrey T. Williams ◽  
Valentina Neglia ◽  
...  
Keyword(s):  
Cryptic Species ◽  
Geographic Distribution ◽  
Fish Species ◽  
Species Complex ◽  
Genetic Relationships ◽  
South Pacific ◽  
The South ◽  
Rapa Nui ◽  
Distribution Ranges ◽  
Geographic Distributions

Rapa Nui, commonly known as Easter Island (Chile), is one of the most isolated tropical islands of the Pacific Ocean. The island location of Rapa Nui makes it the easternmost point of the geographic ranges for many western Pacific fish species that are restricted to the subtropical islands south of 20°S latitude. The blenniid fish speciesCirripectesalboapicalishas been thought to have one of the most extensive geographic distribution ranges among these southern subtropical fish species, extending from the southern Great Barrier Reef to Rapa Nui. A phylogenetic analysis was conducted to determine the taxonomic status of the species. The results provide genetic evidence that suggests that this formerly South Pacific-wide species comprises at least three cryptic species with allopatric geographic distributions. The analyses reveal the geographic distributions of these clades and their genetic relationships with each other, and with other species within the genusCirripectes. The processes that culminated in the current geographic distribution of this species complex and the zoogeographic implications of this finding for the South Pacific region are discussed.

scholarly journals Contrasting effects of climate change on the European and global potential distributions of two Mediterranean helicoid terrestrial gastropods

2019 ◽  
Vol 19 (8) ◽  
pp. 2637-2650 ◽  
Author(s):  
Małgorzata Proćków ◽  
Kamil Konowalik ◽  
Jarosław Proćków
Keyword(s):  
Climate Change ◽  
Global Climate ◽  
Climate Scenario ◽  
Climatic Conditions ◽  
Land Snails ◽  
Limiting Factors ◽  
Terrestrial Gastropods ◽  
Potential Gain ◽  
Distribution Ranges ◽  
Physiological Adaptations

AbstractPredicting the impacts of global climate change on the current and future distribution of alien or endangered species is an essential subject in macroecological studies. Although several investigations have been devoted to animal and plant species, few have addressed terrestrial gastropods. We employed spatial distribution modelling to construct European and global potential distribution ranges of two land snails (Cernuella virgata and Hygromia cinctella) using current and future climate scenarios. Both species have been continuously spreading northward from the Mediterranean region, also being introduced to a few areas outside Europe. We found that under the current climate scenario, most presently occupied areas in Europe are also at high probability of future occurrence of these species. However, under four future climatic conditions, these snails will undergo contrasting scenarios. C. virgata will have a large potential gain, likely due to rising temperatures and its weak fluctuations. In this species, global warming increases in potential area size, accompanied by its morphological and physiological adaptations to arid conditions and the ability to passively disperse, are likely to facilitate invasion into new regions of the world. In contrast, there is no significant change in the geographical distribution of colonisation-prone areas for H. cinctella. Our results demonstrate that wetter climatic conditions in the driest season and greater temperature variability will be key limiting factors of its distribution in the future. An understanding of colonisation patterns can help to better manage these invaders and also to formulate policies for their control.

scholarly journals Geographic Distribution of Archaeal Ammonia Oxidizing Ecotypes in the Atlantic Ocean

2016 ◽  
Vol 7 ◽  
Author(s):  
Eva Sintes ◽  
Daniele De Corte ◽  
Elisabeth Haberleitner ◽  
Gerhard J. Herndl
Keyword(s):  
Atlantic Ocean ◽  
Geographic Distribution

Indigenous and Traditional Knowledge in the IPCC reports: a Systematic Comparative Analysis

2020 ◽  
Author(s):  
Annegret Kuhn
Keyword(s):  
Traditional Knowledge ◽  
Qualitative Content Analysis ◽  
Global Climate ◽  
Second Step ◽  
Epistemic Authority ◽  
Climate Governance ◽  
Multi Level ◽  
The Empirical Analysis ◽  
Governance Arrangements ◽  
Over Time

&lt;p&gt;We recently witness an increasing inclusion of so-called indigenous or traditional knowledge (ITK) in multi-level climate governance arrangements. Some scholars ascribe this development a high potential for fostering legitimacy and effectivity of global climate governance. However, there are also more critical voices, considering the existing political inclusion of ITK deficient or inadequate. In view of the ongoing controversial discussion, this paper critically studies the scope and modalities of ITK inclusion with reference to one of the crucial sources of epistemic authority within global climate governance &amp;#8211; the IPCC. The empirical analysis conducts a systematic quantitative and qualitative content analysis of IPCC Assessment Reports and Special Reports from 1995 to 2019. It studies the different conceptualizations of ITK over time, as well as dominant legitimation narratives arguing for the inclusion of ITK in climate governance. In a second step, consequences for the legitimacy of the IPCC as epistemic authority and global climate governance arrangements more in general are deduced and discussed. &amp;#160;&lt;/p&gt;

How volcanism impact on the variability of the South American Monsoon System and the associated Atlantic Subtropical Cell

2020 ◽  
Author(s):  
Laura Sobral Verona ◽  
Ilana Wainer ◽  
Myriam Khodri
Keyword(s):  
Atlantic Ocean ◽  
Ocean Circulation ◽  
Global Climate ◽  
Volcanic Eruptions ◽  
The South ◽  
Climatic Feature ◽  
Monsoon System ◽  
Convergence Zones ◽  
The Tropics ◽  
Subtropical Cell

&lt;p&gt;Large volcanic eruptions can affect the global climate through changes in atmospheric and ocean circulation. Understanding the influence of volcanic eruptions on the hydroclimate over monsoon regions is of great scientific and social importance. The South America Monsoon System (SAMS) is the most important climatic feature of the continent. Both the Intertropical and the South Atlantic wind convergence zones (ITCZ and SACZ, respectively) are fundamental components of the SAMS. They show variations on a broad range of scales, dependent on complex multi-system interactions with the adjacent Atlantic Ocean and teleconnections. Also driven by the winds, the Atlantic Subtropical Cell (STC) is the link between the subduction zone in the subtropical gyre with the tropics. Hence, the STC influence equatorial sea surface temperature variability on interannual to decadal scales in the tropical Atlantic Ocean. In order to improve our understanding of the responses of the ocean-atmosphere system to the volcanic forcing, we aim to identify the dominant mechanisms of seasonal-to-interdecadal variability of the SAMS and the Atlantic STC after large Pinatubo-like (1991) and Tambora-like (1815) eruptions relying on the VolMIP model intercomparison project experiments.&lt;/p&gt;

scholarly journals Inter-annual variation in seed production has increased over time (1900–2014)

2017 ◽  
Vol 284 (1868) ◽  
pp. 20171666 ◽  
Author(s):  
Ian S. Pearse ◽  
Jalene M. LaMontagne ◽  
Walter D. Koenig
Keyword(s):  
Seed Production ◽  
Seed Set ◽  
Global Climate ◽  
Mast Seeding ◽  
Plant Seed ◽  
Subtle Change ◽  
Animal Populations ◽  
Wide Range ◽  
Seed Crops ◽  
Over Time

Mast seeding, or masting, is the highly variable and spatially synchronous production of seeds by a population of plants. The production of variable seed crops is typically correlated with weather, so it is of considerable interest whether global climate change has altered the variability of masting or the size of masting events. We compiled 1086 datasets of plant seed production spanning 1900–2014 and from around the world, and then analysed whether the coefficient of variation (CV) in seed set, a measure of masting, increased over time. Over this 115-year period, seed set became more variable for plants as a whole and for the particularly well-studied taxa of conifers and oaks. The increase in CV corresponded with a decrease in the long-term mean of seed set of plant species. Seed set CV increased to a greater degree in plant taxa with a tendency towards masting. Seed set is becoming more variable among years, especially for plant taxa whose masting events are known to affect animal populations. Such subtle change in reproduction can have wide-ranging effects on ecosystems because seed crops provide critical resources for a wide range of taxa and have cascading effects throughout food webs.

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