Variación temporal de la distribución espacial por edades de Phoenicopterus ruber (Phoenicopteriformes: Phoenicopteridae) en los humedales de Yucatán, México

The Caribbean Flamingo (Phoenicopterus ruber) in Mexico is distributed throughout the complex of lagoons in coastal wetlands of the Yucatan Peninsula. The species shows a tendency toward differential use of areas between juveniles and adults at different stages of their life cycle, and in different seasons. The aim of this study was to determine the most important areas where flamingos are distributed in Yucatan wetlands, and to describe temporal variations according to age and stages of their life cycle. For this, we used the records of ringed individuals sighted during the period 2010-2015. The areas with the largest numbers of individuals, by stage and season, were identified. Flamingos were recorded in 39 different areas of 43 sampled. In general, the sites with the largest number of records were Isla La Angostura and Punta Mecoh. To both juveniles and adults, areas with higher occupancy rates differed by age between the different stages of the life cycle and seasons. In the Charca Salinera Chel and Isla La Angostura ringed flamingos of almost all ages were recorded. Although already described areas (Celestún, Ría Lagartos) are certainly important, new sites hosting considerable populations at some stage of this species life cycle were detected (e.g. Humedal Progreso; Salamandra, Laguna Rosada; Xcambo). These new sites should be given more attention and important security measures and protection are recommended to all of them. It is necessary to seek new support sources for studies that determine the flamingo population’s status in difficult access areas for which little information is available.

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CAD integrated automatic recognition of weld paths

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-021-07186-0 ◽

2021 ◽

Author(s):

Tuan Anh Tran ◽

Andrei Lobov ◽

Tord Hansen Kaasa ◽

Morten Bjelland ◽

Ole Terje Midling

Keyword(s):

Life Cycle ◽

Spatial Analysis ◽

Product Life Cycle ◽

Real Life ◽

Automatic Recognition ◽

Integrated Method ◽

Weld Joints ◽

Related Information ◽

Almost All ◽

Sequential Assembly

AbstractIn this paper, a CAD integrated method is proposed for automatic recognition of potential weld locations in large assembly structures predominantly comprised of weld joints. The intention is to reduce the total man-hours spent on manually locating, assigning, and maintaining weld-related information throughout the product life cycle. The method utilizes spatial analysis of extracted stereolithographic data in combination with available CAD functions to determine whether the accessibility surrounding a given intersection edge is sufficient for welding. To demonstrate the method, a system is developed in Siemens NX using their NXOpen Python API. The paper presents the application of the method to real-life use cases in varying complexity in cooperation with industrial partners. The system is able to correctly recognize almost all weld lines for the parts considered within a few minutes. Some exceptions are known for particular intersection lines located deep within notched joints and geometries weldable through sequential assembly, which are left as a subject to further works.

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Composition and fluxes of submarine groundwater along the Caribbean coast of the Yucatan Peninsula

Continental Shelf Research ◽

10.1016/j.csr.2014.01.011 ◽

2014 ◽

Vol 77 ◽

pp. 38-50 ◽

Cited By ~ 55

Author(s):

Kimberly A. Null ◽

Karen L. Knee ◽

Elizabeth D. Crook ◽

Nicholas R. de Sieyes ◽

Mario Rebolledo-Vieyra ◽

...

Keyword(s):

Yucatan Peninsula ◽

Caribbean Coast ◽

Yucatán Peninsula ◽

Submarine Groundwater ◽

The Caribbean

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Proximate Composition and Spatio-temporal Heterogeneity of Phytochemicals in Agave sisalana (sisal) adapted in different agro-ecological zones of Punjab, Pakistan

10.21203/rs.3.rs-181255/v1 ◽

2021 ◽

Author(s):

Sobia Shahzad ◽

Mumtaz Hussain ◽

Hassan Munir ◽

Muhammad Arfan

Keyword(s):

Environmental Conditions ◽

Proximate Composition ◽

Block Design ◽

Temporal Variations ◽

Proximate Analysis ◽

Ecological Zones ◽

Autumn Season ◽

Spatial Differences ◽

Different Seasons ◽

Spatio Temporal

Abstract Exploring extractable phytochemicals from locally adapted sisal plant vegetation vary seasonally at different locations. This study elaborated proximate composition and phytochemical heterogeneity in sisal due to varying environmental conditions analyzed from five districts, i.e., Chakwal, Khushab, Rawalpindi, Faisalabad, and Layyah in Punjab, Pakistan. Extensive surveying and plant sampling across two years 2017-18 and 2018-19, during mid-spring, summer, autumn, and winter seasons were carried out for understanding the seasonal impact on sisal. The present study was designed in a randomized complete block design (RCBD) and analyzed considering seasonal, yearly, and locational impact. The spatial differences in phytochemicals concentration were strongly associated with environmental conditions prevailing in different seasons. Autumn season reflected saponins, tannins, and flavonoids in higher concentrations during 2018-19 while steroids and terpenoids were higher during spring 2018-19. While Spatio-temporal variations in the proximate analysis were more apparent in different samples collected from different districts. Data recorded for the Khushab district and autumn season reflected the higher composition of a proximate analysis and phytochemical contents as compared to other seasons. Overall, the spatial differences in phytochemicals concentration were strongly associated with soils and environmental conditions prevailing in different seasons in selected districts.

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Corrigendum to: “Composition and fluxes of submarine groundwater along the Caribbean coast of the Yucatan Peninsula” [Cont. Shelf Res. 77 (2014), 38–50, doi: 10.1016/j.csr.2014.01.011]

Continental Shelf Research ◽

10.1016/j.csr.2014.04.008 ◽

2014 ◽

Vol 82 ◽

pp. 128

Author(s):

Kimberly A. Null ◽

Karen L. Knee ◽

Elizabeth D. Crook ◽

Nicholas R. de Sieyes ◽

Mario Rebolledo-Vieyra ◽

...

Keyword(s):

Yucatan Peninsula ◽

Caribbean Coast ◽

Yucatán Peninsula ◽

Submarine Groundwater ◽

The Caribbean

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Ireland: Coalition Politics in a Fragmenting Party System

10.1093/oso/9780198868484.003.0011 ◽

2021 ◽

pp. 357-395

Author(s):

Paul Mitchell

Keyword(s):

Life Cycle ◽

Party System ◽

Coalition Government ◽

Limited Government ◽

Coalition Governments ◽

Coalition Politics ◽

System P ◽

Fianna Fail ◽

The Government ◽

Almost All

Ireland is a parliamentary democracy created as a result of a revolutionary secession from the United Kingdom. While Ireland has many institutional and administrative features that are quite similar to the Westminster model, there are also some important departures, most notably the adoption of limited government via a written constitution, and the adoption of PR-STV which has facilitated the formation of coalition governments. For most of the twentieth century (up until 1989 at least) a Fianna Fáil single-party government was the default outcome of the government-formation process, though many of these cabinets were ‘large’ minority administrations. The only method of ejecting Fianna Fáil was for the second- and third-largest parties (Fine Gael and Labour) to form a coalition government, which they did on a number of occasions. The bargaining environment permanently changed in 1989 when Fianna Fáil broke the habit of a lifetime and entered its first coalition with the Progressive Democrats. Since then almost all governments have been coalitions. This chapter examines the life cycle of coalition government in Ireland: formation, governance, and dissolution. Coalition agreements have evolved over the decades and have become much more important, detailed, and hence more lengthy. The coalition programme plays a key role in the work of the cabinet and the relations between the parties. The increasingly detailed coalition agreements are a very important commitment device during the life cycle of coalition governments. The increasing fragmentation of the party system has meant that coalition formation bargaining has become more challenging.

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Assessing wastewater treatment in Latin America and the Caribbean: Enhancing life cycle assessment interpretation by regionalization and impact assessment sensibility

Journal of Cleaner Production ◽

10.1016/j.jclepro.2016.11.068 ◽

2017 ◽

Vol 142 ◽

pp. 2140-2153 ◽

Cited By ~ 32

Author(s):

Flor Hernández-Padilla ◽

Manuele Margni ◽

Adalberto Noyola ◽

Leonor Guereca-Hernandez ◽

Cecile Bulle

Keyword(s):

Wastewater Treatment ◽

Latin America ◽

Life Cycle Assessment ◽

Life Cycle ◽

Impact Assessment ◽

The Caribbean

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Age, growth, and mortality of Loligo vulgaris wild paralarvae: implications for understanding of the life cycle and longevity

ICES Journal of Marine Science ◽

10.1093/icesjms/fsq014 ◽

2010 ◽

Vol 67 (6) ◽

pp. 1119-1127 ◽

Cited By ~ 17

Author(s):

Ángel F. González ◽

Jaime Otero ◽

Graham J. Pierce ◽

Ángel Guerra

Keyword(s):

Life Cycle ◽

Growth Rates ◽

Total Mortality ◽

Instantaneous Rate ◽

Relative Growth Rates ◽

Loligo Vulgaris ◽

Growth Increments ◽

Ría De Vigo ◽

Size At Age ◽

Almost All

Abstract González, Á. F., Otero, J., Pierce, G. J., and Guerra, Á. 2010. Age, growth, and mortality of Loligo vulgaris wild paralarvae: implications for understanding of the life cycle and longevity. – ICES Journal of Marine Science, 67: 1119–1127. Age, growth, and mortality were estimated for the first time in wild paralarvae of the common squid, Loligo vulgaris, by examining growth increments in the statoliths of 273 animals collected off the Ría de Vigo (NW Spain, NE Atlantic). Hatching was all year round for the period 2003–2005, with a peak during late spring and a secondary peak during early autumn. Paralarvae varied from 1260 to 7580 µm, and their abundance decreased abruptly as they grew. Statolith increments were clearly visible without grinding in almost all material, allowing reliable estimation of age. Paralarvae are planktonic for at least 3 months. Growth in dorsal mantle length (DML) during that period fitted an exponential equation. The instantaneous relative growth rates were 2.11, 2.15, and 1.82% DML d−1 for 2003, 2004, and 2005, respectively, and there were no significant differences in size-at-age between the 3 years. Taking into account the growth rates estimated for the whole cycle of L. vulgaris, we suggest that the lifespan may previously have been underestimated by 3 months, because the proximity of the rings deposited during paralarval and early juvenile stages would prevent accuracy in enumerating the number of growth increments in later stages. The estimated instantaneous rate of total mortality during the first 90 d of a paralarva life was 9.6, 5.3, and 4.8% d−1 for 2003, 2004, and 2005, respectively. Eye diameter was a reliable and rapid way of estimating DML and age.

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Impacts of climate and reclamation on temporal variations in CH<sub>4</sub> emissions from different wetlands in China: from 1950 to 2010

Biogeosciences ◽

10.5194/bg-12-6853-2015 ◽

2015 ◽

Vol 12 (23) ◽

pp. 6853-6868 ◽

Cited By ~ 9

Author(s):

T. Li ◽

W. Zhang ◽

Q. Zhang ◽

Y. Lu ◽

G. Wang ◽

...

Keyword(s):

Climate Warming ◽

Coastal Wetlands ◽

Temporal Variations ◽

Tibet Plateau ◽

Atmospheric Methane ◽

Temporal And Spatial Variations ◽

Ch4 Emissions ◽

Natural Wetlands ◽

Temporal And Spatial ◽

Qinghai Tibet Plateau

Abstract. Natural wetlands are among the most important sources of atmospheric methane and thus important for better understanding the long-term temporal variations in the atmospheric methane concentration. During the last 60 years, wetlands have experienced extensive conversion and impacts from climate warming which might result in complicated temporal and spatial variations in the changes of the wetland methane emissions. In this paper, we present a modeling framework, integrating CH4MODwetland, TOPMODEL, and TEM models, to analyze the temporal and spatial variations in CH4 emissions from natural wetlands (including inland marshes/swamps, coastal wetlands, lakes, and rivers) in China. Our analysis revealed a total increase of 25.5 %, averaging 0.52 g m−2 per decade, in the national CH4 fluxes from 1950 to 2010, which was mainly induced by climate warming. Larger CH4 flux increases occurred in northeastern, northern, and northwestern China, where there have been higher temperature rises. However, decreases in precipitation due to climate warming offset the increment of CH4 fluxes in these regions. The CH4 fluxes from the wetland on the Qinghai–Tibet Plateau exhibited the lowest CH4 increase (0.17 g m−2 per decade). Although climate warming has accelerated CH4 fluxes, the total amount of national CH4 emissions decreased by approximately 2.35 Tg (1.91–2.81 Tg), i.e., from 4.50 Tg in the early 1950s to 2.15 Tg in the late 2000s, due to the wetland loss totalling 17.0 million ha. Of this reduction, 0.26 Tg (0.24–0.28 Tg) was derived from lakes and rivers, 0.16 Tg (0.13–0.20 Tg) from coastal wetlands, and 1.92 Tg (1.54–2.33 Tg) from inland wetlands. Spatially, northeastern China contributed the most to the total reduction, with a loss of 1.68 Tg. The wetland CH4 emissions reduced by more than half in most regions in China except for the Qinghai–Tibet Plateau, where the CH4 decrease was only 23.3 %.

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