A new species of the genus Nanosesarma (Crustacea: Decapoda: Brachyura: Sesarmidae), and redescription of Nanosesarma jousseaumei (Nobili, 1906), including new records from the Persian Gulf

A new species of sesarmid crab from the Persian Gulf, Nanosesarma sarii n. sp. is described. Further, a poorly known species, N. jousseaumei (Nobili, 1906 Nobili, G. 1906. Faune carcinologique de la Mer Rouge. Décapodes et Stomatopodes. Ann Sci Nat, Zool ser. 9., 4(1): 1–347.  [Google Scholar]), is recorded from the Persian Gulf and recognized as a valid species. N. sarii n. sp. is allied to N. minutum (De Man, 1887) and N. jousseaumei (Nobili, 1906) Nobili, G. 1906. Faune carcinologique de la Mer Rouge. Décapodes et Stomatopodes. Ann Sci Nat, Zool ser. 9., 4(1): 1–347.  [Google Scholar], but is easily distinguishable from them through a number of characters, in particular the upper surface of the palm with a longitudinal granular ridge, the upper surface of the movable finger fully covered with tubercles, and abdomen of the male with the sixth segment wide and the seventh segment remarkably elongate. N. jousseaumei differs from its remaining congeners in having a large gap between the cheliped fingers, a large tubercle proximally on the outer surface of the movable finger, and large teeth on the posterior margin of the merus of the walking legs.     

Planktonic copepod community of a reef zone in the southern Gulf of Mexico

ABSTRACT

In this study, the variation of seasonal and inter-annual density and diversity of the copepod community in the Parque Nacional Sistema Arrecifal Veracruzano (PNSAV) was analysed. Samples were collected under nortes, rainy and dry weather conditions in 2011, as well as under nortes and dry weather conditions in 2012 and 2013 in four transects. Surface trawls with 330-μm conical nets were made. The temperature, salinity and dissolved oxygen were measured in situ. The values obtained were 23.07 ± 0.53 to 29.29 ± 0.27°C for temperature, 33.43 ± 0.49 to 35.91 ± 0.09 for salinity, and 2.52 ± 0.08 to 6.56 ± 0.08 mg l^?1 for dissolved oxygen. The copepods collected belonged to 19 families, 28 genera and 62 species. Copepods represented between 69.74% and 76.79% of the abundance of crustaceans present in zooplankton. The highest number of copepods occurred under nortes weather conditions in 2011 with 401,885 ± 28,092 copepods/100 m³ of the species Temora stylifera. In 2012, 256,325 ± 76,872 copepods/100 m³ of the species Paracalanus aculeatus were obtained and in 2013, 311,526 ± 76,872 copepods/100 m³ of the species T. turbinata. The highest specific richness was found in the southern zone with 28 species. In 2013 the highest density was found in the northern zone with 100,323 ± 28,888 copepods/100 m³. The highest diversity was found under dry weather conditions in 2011 with 3.71 bits/individual. In the 3 years of study, 24 species were dominant; 12 of these, appeared in the 3 years of sampling: T. stylifera, T. turbinata, Labidocera scotti, P. aculeatus, O. latus, Pontellopsis villosa, Centropages velificatus, Parvocalanus crassirostris, Corycaeus speciosus, Undinula vulgaris, Oithona plumifera, and Farranula gracilis. Canonical correlation analysis showed the formation of five groups explained by the neritic or oceanic affinity of the species and their tolerance to changes in salinity or temperature.     

The paleoclimate environment and recent sea level change on the seashores of Thailand Gulf in Southeast Asia

This paper analyzed and researched on several significant natural geological sections from the views of stratum-sequence stratigraphy, climate stratigraphy, event stratigraphy and regional stratigraphy by the investigation of Thailand, Malaysia and Singapore. In combination with the coupling relationship between the life-temperature of regional life zone and the evolution of geological environment, this paper exactly made out the geological sediment records of paleoclimate times in different time scales of 3 kaBP, 1 kaBP and 0.5 kaBP since the past glacier age of Quaternary period, and it is consecutive and authentic for the material medium and time joint. These studies definitely reflected that the sea level of Thailand Gulf area is in tendency of continually dropping in recent years. They also provided important and new information for the global change analysis.     

北部湾海洋微生物物种多样性与化学多样性研究进展

北部湾海域是我国生物多样性最丰富的海域之一,为人类发展提供了大量的生物资源。北部湾还蕴含着极丰富的微生物资源,是新物种、新基因、新药物、新生物材料的潜在来源。为更全面地了解北部湾海洋微生物的研究现状,促进北部湾海洋微生物资源的研究和开发利用,本文综述了北部湾海洋微生物的物种多样性和代谢产物活性成分多样性,为深入研究北部湾海洋微生物,开发和利用北部湾海洋微生物资源提供参考。     

北部湾夏、冬两季异养细菌的水平分布特征及其影响因子

于2006年7月15日-8月7日和2006年12月25日-2007年1月22日对北部湾夏、冬两季水体中异养细菌丰度进行调查,探讨环境网子对异养细菌丰度的影响.结果表明,北部湾夏、冬两季异养细菌平均丰度分别是8.00×103和3.85× 102 mL-1.夏季北部湾北部海域表、中、底3个水层异养细菌丰度均显著高于中部和南部海域(p＜0.05),而冬季北部海域表层水体反而成为异养细菌丰度的低值区(p＜0.05),中层和底层水体中异养细菌丰度分布差异不大.随着离岸距离的增加,夏季水体中异养细菌丰度呈现逐步降低的趋势,而冬季这种趋势不明显.活性硅酸盐(SiO3 -Si)和叶绿素a(Chl a)浓度是影响北部湾夏、冬季异养细菌丰度水平分布的关键环境因子.除此之外,冬季水体中异养细菌的丰度还与温度、盐度和溶解氧(DO)显著相关.     

北部湾——要成为经济增长第四极还缺什么

在全国许多地区都在申请综合配套改革试验区的背景下,广西北部湾地区力争成为经济增长第四极。回顾了增长极理论的内涵和实践效果,通过与前3个经济增长极的对比,分析了北部湾的区际和区内关系,从空间经济学的角度论述了一体化和协调发展的含义,并提出了相应的建议。     

北部湾海表面温度变化特征及其影响因素分析

【目的】了解北部湾海表面温度(SST)变化特征及其影响因素。【方法】根据NOAA提供的北部湾海域1994~2013年间SST、海面风场、潜热通量、Nino 3.4指数资料,采用平均值法、最小二乘法分析海域冬、夏两季SST分布及变化特征;采用相关系数法计算SST与海面风场、潜热通量及Nino 3.4指数间的相关系数,分析海面风场、潜热通量、厄尔尼诺效应对SST的影响。【结果】1994~2013年间,北部湾海域冬季SST约为19.0~24.0℃,大致呈"北冷南暖"的特点,夏季SST相差不大,约为28.6~29.8℃;海域冬季以降温为主,幅度约为-0.03℃/a,夏季则表现为小幅度升温,幅度约为0.01℃/a;纬向风、潜热通量对SST影响较大,厄尔尼诺事件仅在厄尔尼诺显著年对SST有显著的影响。【结论】纬向风、潜热通量对北部湾SST影响较大,厄尔尼诺现象在厄尔尼诺显著年对SST有较大的影响。     

2014年北部湾主要河流污染状况及污染物入海通量

[目的]研究广西北部湾主要河流的污染状况及污染物入海通量,分析主要污染物的来源及其对近岸海域水质的影响,为该流域污染物控制和近岸海洋生态环境保护提供科学依据。[方法]于2014年的丰、枯水期对广西北部湾近岸海域主要河流防城江、茅岭江、钦江、大风江和南流江的污染状况及污染物入海通量进行监测。[结果]影响河流监测断面水质的污染物主要有无机氮、无机磷和化学需氧量。丰水期各河流无机氮基本属四类或劣四类;无机磷除大风江属一类外,其余属劣四类;防城江的化学需氧量属劣四类,钦江属劣二类,其余属劣一类。枯水期各河流无机氮基本属四类或劣四类;无机磷除大风江属一类外,其余基本属四类或劣四类;化学需氧量基本属一类或劣一类。2014年广西北部湾主要河流的污染物入海通量为175 596.02 t,其中化学需氧量的入海通量约占污染物总入海量的59.1%,总氮约占37.8%,总磷约占2.0%,油类约占0.6%,重金属约占0.4%,硫化物约占0.1%。[结论]入海的河流污染物主要有化学需氧量、总氮、总磷和油类,茅岭江的总氮、总磷和化学需氧量主要源于生活污水和畜禽养殖污染源,油类主要源于畜禽养殖污染源;钦江的总氮、总磷主要源于畜禽养殖和种植业污染源,化学需氧量和油类主要源于畜禽养殖污染源;南流江的总氮、总磷、化学需氧量和油类主要源于畜禽养殖污染源。入海的河流污染物中化学需氧量、无机氮、无机磷和油类的污染负荷较高,但影响近岸海域水质的污染物主要是无机氮和无机磷。     

以产业为载体的北部湾经济区人才开发模型论

以北部湾经济区人才开发为例,提出产业结构与人才的关系模型,分析产业技术结构对人才结构的影响、产业链与人才开发,产业融合趋势与开发人才。构建基于产业结构的人才开发模型。认为北部湾经济区近期应该以选择跟进战略—WO战略为主,人才的发掘、培养、使用紧紧围绕区域产业的状况和调整对人才的需求来进行。中长期以选择联动战略—SO战略为主,坚持人才资源开发与产业的布局调整相协调,把人才结构调整作为推动产业结构战略性调整的重要内容。