A5044141436- Marine Biology and Ecology Research
- Environmental DNA in Biodiversity Studies
- Identification and Quantification in Food
- Parasite Biology and Host Interactions
- Genetic diversity and population structure
- Marine and coastal plant biology
- Animal Ecology and Behavior Studies
- Aquatic Invertebrate Ecology and Behavior
- Species Distribution and Climate Change
- Plant and animal studies
- Marine Ecology and Invasive Species
- Social and Educational Sciences
- Amphibian and Reptile Biology
- Fish Ecology and Management Studies
- Marine Toxins and Detection Methods
- Genomics and Phylogenetic Studies
- Mollusks and Parasites Studies
- Marine Bivalve and Aquaculture Studies
- Animal and Plant Science Education
- Environmental Toxicology and Ecotoxicology
- Crustacean biology and ecology
- Science Education and Pedagogy
- Marine and fisheries research
- Marine Biology and Environmental Chemistry
- Evolution and Paleontology Studies
Colgate University
2024
University of Gothenburg
2008-2023
Box (United States)
2023
The protection, preservation and restoration of aquatic ecosystems their functions are global importance. For European states it became legally binding mainly through the EU-Water Framework Directive (WFD). In order to assess ecological status a given water body, biodiversity data obtained compared reference body. quantified mismatch determines extent potential management actions. current approach assessment is based on morpho-taxonomy. This has many drawbacks such as being time consuming,...
The phenomenon of codon usage bias is known to exist in many genomes and it mainly determined by mutation selection. To understand the patterns nemertean mitochondrial genomes, we use bioinformatic approaches analyze protein-coding sequences eight species. Neutrality analysis did not find a significant correlation between GC12 GC3. ENc-plot showed few genes on or close expected curve, but majority points with low-ENc values are below it. suggested that mutational plays major role shaping...
Whereas many nemerteans (ribbon worms; phylum Nemertea) can be identified from external characters if observed alive, are still problematic. When it comes to preserved specimens (as in e.g. marine inventories), there is a particular need for specimen identifier alternatives. Here, we evaluate the utility of COI (cytochrome c oxidase subunit I) as single-locus barcoding gene. We sequenced, data mined, and compared gene fragments 915 individuals representing 161 unique taxonomic labels 71...
Marine hard-bottom communities are undergoing severe change under the influence of multiple drivers, notably climate change, extraction natural resources, pollution and eutrophication, habitat degradation, invasive species. Monitoring marine biodiversity in such habitats is, however, challenging as it typically involves expensive, non-standardized, often destructive sampling methods that limit its scalability. Differences monitoring approaches furthermore hinders inter-comparison among...
We investigated the use of eDNA metabarcoding for supplementing traditional diver-based monitoring biodiversity marine boulder reefs within photic zone. The applied sampling design made it possible to evaluate usefulness as a supplement monitoring. Specifically, this study aimed (1) assess local influence on across North Sea Baltic transition zone and (2) investigate importance environmental gradients patterns in community structure. On samples collected during August 2020, we compared...
Annelids of the genus Ophryotrocha are small opportunistic worms commonly found in polluted and nutrient-rich habitats such as harbors. Within this group about 40 described taxa a large variety reproductive strategies found, ranging from gonochoristic broadcast spawners to sequential hermaphroditic brooders. Many species have short generation time easily maintained laboratory cultures. Thus they become popular system for exploring biological questions including developmental genetics,...
Aim: The aim of this study was to assess the biodiversity and community structure Swedish meiofaunal eukaryotes using metabarcoding. To validate reliability metabarcoding approach, we compare taxonomic resolution obtained mitochondrial cytochrome oxidase 1 (COI) 'mini-barcode' nuclear 18S small ribosomal subunit (18S) V1-V2 region, with traditional morphology-based identification Xenacoelomorpha Nematoda. Location: 30 samples were analysed from two ecologically distinct locations along west...
Variation in taxonomic characters from Tetrastemma laminariae (Hoplonemertini, Nemertini) was analysed by, and expressed in, different types of statistics (coefficient variation, range, coefficient residual variation variance logarithms). Variance based on log‐transformed values makes it possible to test differences between populations. The high most characters, probably owing artifacts, especially contraction fixation. Because this the species have be diagnosed by many properly stated not...
We test previous claims that the bacteria Vibrio alginolyticus produces tetrodotoxin (TTX) when living in symbiosis with nemertean Lineus longissimus by a setup cultivation for TTX production. Toxicity experiments on shore crab, Carcinus maenas, demonstrated presence of paralytic toxin, but evidence from LC-MS and electrophysiological measurements voltage-gated sodium channel–dependent nerve conductance male Wistar rat tissue showed conclusively this effect did not originate TTX. However,...
The phylogeny of Nereidiformia is assessed in a parsimony analysis combined morphological and DNA data, with special focus on previously questioned relationships between Chrysopetalidae Hesionidae, Pilargidae the affinities Hesionides Microphthalmus. A 660 bp segment mtDNA cytochrome c oxidase subunit I gene was sequenced for two chrysopetalids, one nereidid, pilargid, pisionid, hesionids, plus questionable hesionids arenaria Microphthalmus sp. Phylogenetic resolution poor data alone, but...
We compared the anatomy of holotype palaeonemertean Cephalothrix simula (Iwata, 1952) with that holotypes hongkongiensis Sundberg, Gibson and Olsson, 2003 fasciculus 1952), as well additional specimens from Fukue (type locality C. simula) Hiroshima, Japan. While there was no major morphological discordance between these specimens, we found discrepancies actual morphology some statements in original description respect to supposedly species-specific characters. Our observation indicates three...
The polymerase chain reaction (PCR) was used to produce species-specific DNA markers (RAPDs) from two sibling cockle species and five other co-occurring intertidal bivalves. Amplification reactions with one single primer readily distinguished larvae adults of Cerastoderma edule C. lamarcki , Mya arenaria Macoma balthica Scrobicularia plana Venerupis pulastra Mytilus edulis . Random amplified polymorphic (RAPD) is suggested as a simple quick method determine identity in taxa that are...
Phylogeographic inferences concerning marine species are largely based on intertidal species. In high latitudes, have been affected by ice coverage and scour, therefore show northern range limitations during glaciations. this study, we use the subtidal horse mussel ( Modiolus modiolus ) to investigate whether generalizations about genetic structure of latititude species, specifically in North Atlantic, representative other near shore taxa. We analysed diversity, molecular variance,...
SMITH, A. B. 1994. Rooting molecular trees: Problems and strategies. Biol. J. Linn. Soc. 51:279–292. SOLTIS , D. E., AND 15 OTHER AUTHORS. 1997. Angiosperm phylogeny inferred from 18S ribosomal DNA sequences. Ann. Mo. Bot. Gard. 84:1– 49. SWOFFORD, L. 1999. PAUP¤ : Phylogenetic analysis using parsimony, version 4.0. Sinauer Associates, Sunderland, Massachusetts. TEMPLETON, R. 1983. inference restriction endonuclease cleavage site maps with particular reference to the evolution of humans...
We used morphological, vocal and molecular (one mitochondrial two nuclear loci) data to re-evaluate the taxonomic status of taxa acanthizoides, concolor, brunnescens in Cettia acanthizoides (J. Verreaux, 1871) complex. conclude that all three are valid taxa, China concolor Taiwan best treated as conspecific, whereas Himalayas is better considered a separate species. The degree vocal, genetic differentiation variably congruent among taxa; recently separated differ slightly plumage structure...
The problem of invasive species is a well-studied one, but knowledge free-living unicellular eukaryotic lacking. A potentially foraminifer (Rhizaria), Nonionella sp. T1, was recently discovered in the Skagerrak and its fjords. Digital polymerase chain reaction (dPCR) applied to track spread this non-indigenous using new dPCR assay (T1-1). use appears highly complementary traditional hand picking foraminiferal shells from sediment, far less time-consuming. This study indicates that T1 has...
We question recent claims that cladistic analysis is inapplicable in nemerteans (phylum Nemertea) due to a supposedly high degree of convergence. further argue terms like convergence and parallelism are historical sayings only make sense phylogenetic context. Therefore, an approach aiming produce hypotheses cannot be rejected on the grounds before actual hypothesis. Convergence not empirical observation, but conclusion made after analysis. also discuss view knowledge character's function...
Abstract On 25 August 2022, the Zoologica Scripta ‐ An International Journal of Systematic Zoology and Norwegian Academy Sciences Letters arranged a symposium entitled ‘The role systematics for understanding ecosystem functions’ in Academy's premises Oslo, Norway. The aimed at offering forum exploring discussing trends future developments field systematics. Eleven international experts contributed expertise on various issues related to global challenges, such as biodiversity assessments,...
0.0 Abstract Non-indigenous species (NIS) is one of the five most global concerns when it comes to ecosystem services and threats native biodiversity. This especially true in aquatic environments which are harder monitor than terrestrial environments, NIS often found first they fully established basically impossible eradicate. In marine this further complicated due connectivity difficulty eradication. The development implementation effective monitoring methods for therefore crucial enable...
Schander, C., Halanych, K. M., Dahlgren, T. & Sundberg, P. (2003) Test of the monophyly Odostomiinae and Turbonilliinae (Gastropoda, Heterobranchia, Pyramidellidae) based on 16S mtDNA sequences. — Zoologica Scripta, 32 , 243−254. While gastropod phylogeny has received much recent attention, relationships within some major clades have still not been studied. The Pyramidellidae is one such group, comprising more than 6000 named species in 350 genera. We sequenced part mitochondrial gene...
We present a COI-based parsimony analysis of the relationships between shallow water, pigmented hesionid polychaete Nereimyra punctata, and deep-water, unpigmented form with sympatric distribution in Norway Sweden. Apart from pigmentation differences, two forms exhibit no observed morphological differences. The terminals are represented by four specimens each Trondheimsfjord Norway, northern Bohuslän Sweden, plus members hesionids Heteropodarke Ophiodromus as outgroups. In addition, includes...