Results 21 to 30 of about 4,119 (196)

Gaps and Data Ambiguities in DNA Reference Libraries: A Limiting Factor for Molecular-Based Biodiversity Assessments Using Annelids as a Case Study. [PDF]

Ecol Evol
Regional DNA reference libraries are crucial for molecular biodiversity assessments, yet they remain incomplete, limiting their effectiveness. Using annelids from the Arabian Peninsula as a case study, we identified considerable gaps in species coverage and minimal representation in public databases.
Teixeira MAL, Aylagas E, Pearman JK, Carvalho S.   +3 more
europepmc   +2 more sources

Abundance, biomass and species richness of macrozoobenthos along an intertidal elevation gradient. [PDF]

Ecol Evol, 2023
This study investigates the spatio‐temporal dynamics of macrozoobenthos communities on back‐barrier tidal flats in the East Frisian Wadden Sea. They found significant changes in species composition and a decrease in abundance and species richness from west to east on the East Frisian Islands, while extremely high total organic carbon content was ...
Dewenter J, Yong J, Schupp PJ, Lõhmus K, Kröncke I, Moorthi S, Pieck D, Kuczynski L, Rohde S.   +8 more
europepmc   +2 more sources

The Core of the Matter-Importance of Identification Method and Biological Replication for Benthic Marine Monitoring. [PDF]

Ecol Evol
Benthic macrofauna are important and widely used biological indicators of marine ecosystems as they have limited mobility and therefore integrate the effects of local environmental stressors over time. We here compare environmental DNA metabarcoding obtained from sediments with conventional morphological identification of benthic macrofauna.
Jensen MR, Agersnap S, Sigsgaard EE, Ávila MP, Glenner H, Wisz MS, Thomsen PF.   +6 more
europepmc   +2 more sources

بررسی ضریب پایداری و فاکتورهای زیست محیطی موثر بر فراوانی پرتاران ناحیه بین جزر و مدی ساحل بندر لنگه [PDF]

زیست‌شناسی کاربردی, 2011
به منظور بررسی پرتاران درمنطقه بندرلنگه ، نمونه برداری فصلی بوسیله کوادرات (به ابعاد 25/0 متر مربع و عمق نمونه برداری 30 تا 40 سانتیمتر) از آبان 1387 تا مرداد 1388 با تعیین دو ترانسکت در ناحیه بین جزرومدی وسه ایستگاه درهرترانسکت انجام شد.
فریبا احمدیانی, محمد باقر نبوی, محمدرضا فاطمی, نسیم تبارکی   +3 more
doaj   +1 more source

Infestation of Polydora rickettsi (Polychaeta: Spionidae) in shells of Crepidula fecunda (Mollusca: Calyptraeidae) in relation to intertidal exposure at Yaldad Bay, Chiloe, Chile

Scientia Marina, 2005
We studied the infestation of the burrowing polychaete Polydora ricketsi on the shells of Crepidula fecunda in relation to the degree of intertidal exposure in Yaldad Bay (Chile). 175 specimens of C.
Carlos Beltrán, Luis Vargas, Pedro Quijón   +2 more
doaj   +1 more source

Use of axial tomography to follow temporal changes of benthic communities in an unstable sedimentary environment (Baie des Ha! Ha!, Saguenay Fjord) [PDF]

, 2003
In the upper layer of the sediment column, organic matter recycling is greatly influenced by bioturbation. However, there are many physical changes in the nature of the sediment that may disturb benthic communities and create a biogeochemical imbalance ...
Aller, Aller, Aller, Aller, Aller, Aller, Berger, Bernard Long, Boespflug, Boespflug, Bray, Canfield, Clarke, Coleman, Crémer, de Montety, Deflandre, Desrosiers, du Berger, Duliu, Emilien Pelletier, Emma Michaud, Franck Gilbert, François, Gage, Gaston Desrosiers, Georges Stora, Gilbert, Gérino, Gérino, Hounsfield, Hulthe, Jacques Locat, Jean-François Crémer, Jones, Kantzas, Kenter, Krantzberg, Kristensen, Kuehl, Lapointe, Laure de Montety, Ligier, Locat, Maurice, Michaud, Mucci, Nerhing, Orsi, Pearson, Pearson, Pelletier, Pelletier, Prena, Rhoads, Rhoads, Rhoads, Rhoads, Rhoads, Risk, Schafer, Sorensen, Stora, Thistle, Tita, Urgelès, Wellington, Yeo, Yu, Zajac, Zar   +70 more
core   +5 more sources

Una nueva especie del género Prionospio Malmgren, 1867 (Annelida, Spionidae) procedente del sureste del golfo de Vizcaya

Graellsia, 2019
Una nueva especie, Prionospio rikardoi n. sp. ha sido identificada en fondos circalitorales de las costas del País Vasco (SE del golfo de Vizcaya). La nueva especie se caracteriza por poseer crestas dorsales en varios segmentos corporales y cuatro pares ...
Julián Martínez, Idoia Adarraga
doaj   +1 more source

Application of environmental DNA metabarcoding and quantitative PCR to detect blooming jellyfish in a temperate bay of northern China

Ecology and Evolution, Volume 13, Issue 11, November 2023., 2023
We developed eDNA metabarcoding and quantitative PCR for the detection and assessment of jellyfish taxa in the temperate Yantai Sishili Bay (YSB) and estimated the spatial distribution of Aurelia coerulea. Our results demonstrate the potential of two eDNA techniques in jellyfish biomass investigation and jellyfish taxa detecting.
Saijun Peng, Lei Wang, Yuanqing Ma, Lijing Ye, Chaowei Hou, Yongliang Liu, Yongxue Li, Tingting Sun, Jianmin Zhao, Zhijun Dong   +9 more
wiley   +1 more source

Pelvic spine reduction affects diet but not gill raker morphology in two polymorphic brook stickleback (Culaea inconstans) populations

Ecology and Evolution, Volume 13, Issue 9, September 2023., 2023
The extent of parallelism might generally be lower in between‐species versus between‐population comparisons. In two populations of brook sticklebacks, we found that diet differences were associated with pelvic spine reduction, but we found no evidence of any difference in gill raker morphology associated with pelvic spine reduction. This is in contrast
Jonathan A. Mee, Emily Yap, Daniel M. Wuitchik   +2 more
wiley   +1 more source

A new species of the genus Aonides Claparède, 1864 (Polychaeta, Spionidae) from the Macaronesian Region (Eastern Central Atlantic)

Scientia Marina, 2006
P align=justify>A new spionid of the genus Aonides Claparède, 1864 has been collected in a muddy sand bottom of a marine cave from the Selvagens Islands.
María del Carmen Brito, Jorge Núñez, Rodrigo Riera   +2 more
doaj   +1 more source