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Zoobentos en ambientes leniticos de la cuenca del Río Cuarto (Córdoba, Argentina) 夸尔多河流域（阿根廷科尔多瓦）鳞状环境中的底栖生物
Ecosur Pub Date : 2024-02-16 DOI: 10.30972/eco.11217361
M. C. Corigliano, Noemí del Carmen Poloni de Capiello
{"title":"Zoobentos en ambientes leniticos de la cuenca del Río Cuarto (Córdoba, Argentina)","authors":"M. C. Corigliano, Noemí del Carmen Poloni de Capiello","doi":"10.30972/eco.11217361","DOIUrl":"https://doi.org/10.30972/eco.11217361","url":null,"abstract":"Some lenitic water bodies associated to Río Chucul and Río Saladillo on the Río Cuarto basin were selected in order to evaluate the composition and structure of macro-invertebrate benthonic fauna.Field works were conducted in September 1983 and May and November 1984. Cualitative and cuantitative samples were analyzed as well as the relationships between inventories determined by diversity, similarity and association indices. The observed dominant species were: Tanypus sp., Paratanytarsus sp. (Díptera), and Littoridina parchappei (Mollusca). Localities showed similar degrees of affinity (X = 0,36), the epifauna and infauna of the same place being most related. Each biotope was structurally and functionally different in composition.Diversity of life forms seem to be related to resource and microhabitat variations. The pools that are isolated from fluvial course have a richer fauna, a more complex trophic wed and are evolving to terrestrial stages.","PeriodicalId":511020,"journal":{"name":"Ecosur","volume":"33 32","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139962197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Regulación de la temperatura en Chaetophractus villosus 茶龙的温度调节
Ecosur Pub Date : 2024-02-15 DOI: 10.30972/eco.11217356
Roig V. G., Henriquez O. E.
{"title":"Regulación de la temperatura en Chaetophractus villosus","authors":"Roig V. G., Henriquez O. E.","doi":"10.30972/eco.11217356","DOIUrl":"https://doi.org/10.30972/eco.11217356","url":null,"abstract":"Chaetophractus villosus body temperature was observed by means of teletermometers placed at different body depths while kept in captivity in chambers of constant temperature. At a periferical level high variations were recorded. Below 4-5 cm depth temperature variations were alternated until a termical gradient is reached. Nictimeral rithms are showed in nocturnal activity, being, ore evident in reponse to the environmental temperature.Coments about feeding behavior, ecology and fisiology are included. General considerations about filogeny of termo regulation are also given.","PeriodicalId":511020,"journal":{"name":"Ecosur","volume":"5 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Contribución al conocimiento limnológico del Río Bermejo en su tramo inferior 对贝尔梅霍河下游湖沼学知识的贡献
Ecosur Pub Date : 2024-02-15 DOI: 10.30972/eco.11217358
A. A. Bonetto, Y. Zalocar, F. Pedrozo, Carlos A. Bonetto
{"title":"Contribución al conocimiento limnológico del Río Bermejo en su tramo inferior","authors":"A. A. Bonetto, Y. Zalocar, F. Pedrozo, Carlos A. Bonetto","doi":"10.30972/eco.11217358","DOIUrl":"https://doi.org/10.30972/eco.11217358","url":null,"abstract":"The main limnological features of the Bermejo river have been recorded at Puerto Velaz, 30 kilometers upstream the river mouth.The most stricking feature of the Bermejo river is an extremely high rate of suspended solid. The low water transparency limited the phytoplankton growth. Therefore phytoplankton density and primary production were undetectable during the flood period, reaching a máximum of 170 ind/ml and 30 mgC/m2/d respectively during the low water period. Diatoms (Melosira) and Chlorophytes (Scenedesmus) were dominant.The suspended solid concentration reached a máximum of 9,500 mg/1 in the summer flood, during the studied period. The dissolved oxygen was always near saturation. Chemical oxygen demand and water transparency were very low. Conductivity ranged from 850 uS/cm to 310 /uS/cm.","PeriodicalId":511020,"journal":{"name":"Ecosur","volume":"25 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139962291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Cambios estacionales en la biomasa de Eichhornia crassipes (Mart.) Somls y su fauna en una laguna del Chaco (Argentina) 查科（阿根廷）泻湖中 Eichhornia crassipes (Mart.) Somls 生物量及其动物群的季节性变化。
Ecosur Pub Date : 2024-02-15 DOI: 10.30972/eco.11217357
J. J. Neiff, Alicia Poi de Neiff
{"title":"Cambios estacionales en la biomasa de Eichhornia crassipes (Mart.) Somls y su fauna en una laguna del Chaco (Argentina)","authors":"J. J. Neiff, Alicia Poi de Neiff","doi":"10.30972/eco.11217357","DOIUrl":"https://doi.org/10.30972/eco.11217357","url":null,"abstract":"Biomass determinations were made in natural stands of Eichhornia crassipes throughout two year. The samples were monthly collected with a 62 cm diameter ring. The values indicated in the text are the averages of five replicates taken in a transection from a littoral to a central position.The annual net production was obtained from the difference between the final and initial biomass.Four functional compartments were considering: total standing crop; green leaves, roots and rhizomes biomass; dead attached leaves and litter. The greatest total standing crop found in mid summer, was 25 Tn/ha. In the same period, the máximum biomass was recorded. The roots and rhizomes have representad between 31 and 55% of the biomass.The máximum rate of biomass change was found in setember (6,30 Tn/ha).Losses by death (attached leaves and litter) were small before the seasonal máximum plant biomass. The litter ocurring in spring time, has been produced during the last winter.The fauna biomass in the Barranqueras pond was much lower than in other subtropical lakes (8 g/m3 in winter and 16 g/m3 in summer).The high losses from a E. crassipes community are related with the fast activity of the fitofagous during the summer.","PeriodicalId":511020,"journal":{"name":"Ecosur","volume":"21 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Zoobentos de arroyos inmisarios del Embalse Río Tercero con especial referencia a la zonación del Río Grande (Calamuchita, ´Córdoba, Argentina) Rio Tercero 水库溪流中的底栖生物，特别是格兰德河分区（阿根廷科尔多瓦省卡拉穆奇塔）。
Ecosur Pub Date : 2024-02-15 DOI: 10.30972/eco.11217359
M. C. Corigliano, Gladys Mónica Cossarini
{"title":"Zoobentos de arroyos inmisarios del Embalse Río Tercero con especial referencia a la zonación del Río Grande (Calamuchita, ´Córdoba, Argentina)","authors":"M. C. Corigliano, Gladys Mónica Cossarini","doi":"10.30972/eco.11217359","DOIUrl":"https://doi.org/10.30972/eco.11217359","url":null,"abstract":"The structural and functional atributes of zoobenthos in the tributary streams of the Río Tercero reservoir were evaluated. The analysis of Surber samples allows us to determine dominant associations, relative abundance as well as to suggest a tentative approach of trophic structure. The most frequent groups were chironomids and may- flies: Pseudochironomus sp., Pentaneura sp., Baetis sp. and Ephemerella sp. The affinity was high within the same river. In hill stretchs there were more scrapers and in the mouths collectors predominated. It is considered that zonal differentiation of the physiography and physiognomy of each stream basin is expressed in the composition of benthos communities.","PeriodicalId":511020,"journal":{"name":"Ecosur","volume":"5 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heterotrophic consumption by planktonic bacteria and algae in Embalse del Río Tercero (Córdoba, Argentina) Embalse del Río Tercero（阿根廷科尔多瓦）浮游细菌和藻类的异养消耗
Ecosur Pub Date : 2024-02-15 DOI: 10.30972/eco.11217355
M. C. Romero, A. Mariazzi
{"title":"Heterotrophic consumption by planktonic bacteria and algae in Embalse del Río Tercero (Córdoba, Argentina)","authors":"M. C. Romero, A. Mariazzi","doi":"10.30972/eco.11217355","DOIUrl":"https://doi.org/10.30972/eco.11217355","url":null,"abstract":"La actividad heterotrófica de bacterias y algas planctónicas se estimó mediante los parámetros cinéticos obtenidos de la aplicación del método propuesto por Wright y Hobbie (1966). Este método nos permite diferenciar entre los dos mecanismos de consumo hallados en algas y bacterias, simple difusión y transporte activo respectivamente. Comparando las velocidades reales debido a difusión o transporte activo (vd/vt, %) se observó que las algas consumen menos del 10% de la cantidad removida por las bacterias en igual período, siendo éstas más efectivas para consumir sustratos orgánicos presentes en el agua en muy bajas concentraciones (menos de 10 ug • 1-1). Los parámetros obtenidos por simple difusión sólo fueron significativos a fines del verano, sugiriendo que en esa época del año el heterotrofismo algal puede competir con el consumo bacteriano. Ambos mecanismos de consumo son sensibles a variaciones térmicas del ambiente (Q10 : 2,5 a 9,2) por lo cual el uso del agua por la Central Termonuclear de Embalse, pueda incrementar considerablemente el consumo heterotrófico.","PeriodicalId":511020,"journal":{"name":"Ecosur","volume":"17 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Productividad primaria en un estanque de cría de peces (31°12’S; 57°55’W) 鱼类饲养池塘的初级生产力（南纬 31°12'；西经 57°55'）
Ecosur Pub Date : 2024-02-14 DOI: 10.30972/eco.11217349
L. Pizzolon, R. Quirós
{"title":"Productividad primaria en un estanque de cría de peces (31°12’S; 57°55’W)","authors":"L. Pizzolon, R. Quirós","doi":"10.30972/eco.11217349","DOIUrl":"https://doi.org/10.30972/eco.11217349","url":null,"abstract":"Gross and net primary productivity, respiration and related parameters were estimated in an experimental fish pond where silverside (Basilichthys bonariensis) were bred, using the oxygen light-dark bottle method. The results obtained showed a positive correlation (r = 0.83, p < 0.005) with temperature. The chlorophyll a concentration, the number of phytoplankton cells and the Secchi disk showed no correlation with primary productivity.The mean gross primary productivity on sunny days was 2022 g C m-2 day-1 in the deepest zone, with a 47% variation. For the whole pond the results was 358.7 KgC ha-1 year-1 considering a correction for statistical average of sunny days. The respiration/ gross primary productivity relation was 0.50 for the whole pond.With comparative purposes the primary productivity was estimated with the simplified method of daily curves and by the method of oxygen changes in open waters.","PeriodicalId":511020,"journal":{"name":"Ecosur","volume":"120 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Contribución relativa del nanoplancton a la producción primaria y pigmentos fotosintéticos en el Embalse del Río Tercero (Córdoba, Argentina) Río Tercero 水库（阿根廷科尔多瓦）中纳米浮游生物对初级生产和光合色素的相对贡献。
Ecosur Pub Date : 2024-02-14 DOI: 10.30972/eco.11217350
A. A. Mariazzi, M. Romero, P. Arenas
{"title":"Contribución relativa del nanoplancton a la producción primaria y pigmentos fotosintéticos en el Embalse del Río Tercero (Córdoba, Argentina)","authors":"A. A. Mariazzi, M. Romero, P. Arenas","doi":"10.30972/eco.11217350","DOIUrl":"https://doi.org/10.30972/eco.11217350","url":null,"abstract":"A study on primary production and photosynthetic pigments was carried in an eutrophic reservoir (Embalse Río III) during 1980-1981, with the basic purpose of evaluating the importante of nannoplankton (< 30 um) with respect to production and pigments.Nannoplankton had a significative contribution to total primary production and pigments during periods of máximum photosynthetic activity, spring-summer, with 75 and 50% respectively. Nannoplanktonic fraction showed a high photosynthetic effíciency during November 1980 and January 1981 and its activity and numerosity increase was directly related to temperature.","PeriodicalId":511020,"journal":{"name":"Ecosur","volume":"80 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139963854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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