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Publikasjoner
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van Son, Thijs Christiaan; Halvorsen, Rune & Bakke, Torgeir
(2016).
Sampling effort required to recover the main gradients in marine benthic species composition.
Marine Ecology.
ISSN 0173-9565.
37(2),
s. 329–335.
doi:
10.1111/maec.12281.
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Ory, Nicolas Christian; van Son, Thijs Christiaan & Thiel, Martin
(2015).
Mating rock shrimp hedge their bets: old males take greater risk, but only after careful assessment of the investment scenario.
Behavioral Ecology and Sociobiology.
ISSN 0340-5443.
69(12),
s. 1975–1984.
doi:
10.1007/s00265-015-2009-7.
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van Son, Thijs Christiaan; Halvorsen, Rune; Norling, Karl; Bakke, Torgeir Heggelund; Kaurin, Maria & Melsom, Fredrik
(2014).
Identification of fine-scale marine benthic ecoclines by multiple parallel ordination.
Journal of Marine Biology.
ISSN 1687-9481.
2014:462529.
doi:
10.1155/2014/462529.
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van Son, Thijs Christiaan; Oug, Eivind; Halvorsen, Rune & Melsom, Fredrik
(2013).
Gradients in traits composition and their relation to environmental complex-gradients and structuring processes: a study of marine sediment species communities.
The Open Marine Biology Journal.
ISSN 1874-4508.
7,
s. 14–27.
doi:
10.2174/1874450820130827001.
Vis sammendrag
The biological reason for a species' presence under given environmental conditions is that the species possesses
traits that make establishment and survival, usually also reproduction, possible under these conditions. Biological traits
analysis (BTA), when coupled with environmental variables, can provide information regarding which traits are to be
expected for a given environmental state. As such, BTA provides complementary information to multivariate analysis of
community data based on species composition. In this study, BTA was conducted on a data set of sediment macrofauna
collected from a temperate fjord system and related to a wide range of environmental variables. The biological traits were
analysed in a multiple parallel ordination framework, which can enhance the reliability of the extracted gradient structure
and evaluate the importance of weight given to abundance. Two traitclines, gradients in functional attributes of the
species, were found in the study area. The first traitcline was related to bottom currents and sediment constituents while
the second traitcline was related to current strength and particle deposition on the bottom. Together with a companion
study of gradients in species composition (coenoclines), this study of functional features (traitclines) illustrates that the
species composition may consist of taxonomically different, but functionally similar species, giving rise to strong
gradients in species composition but weak gradients in trait category composition when subjected to ordination analyses.
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van Son, Thijs Christiaan & Thiel, Martin
(2007).
Anthropogenic stressors and their effects on the behavior of aquatic crustaceans.
I Duffy, J. Emmett & Thiel, Martin (Red.),
Evolutionary ecology of social and sexual systems : crustaceans as model organisms.
Oxford University Press.
ISSN 978-0-19-517992-7.
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Jentoft, Svein; van Son, Thijs Christiaan & Bjørkan, Maiken
(2007).
Marine protected areas: A governance system analysis.
Human Ecology.
ISSN 0300-7839.
35,
s. 611–622.
doi:
10.1007/s10745-007-9125-6.
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Van, Son Thijs Christiaan & Thiel, Martin
(2006).
Multiple predator effects in an intertidal food web.
Journal of Animal Ecology.
ISSN 0021-8790.
75(1),
s. 25–32.
doi:
10.1111/j.1365-2656.2005.01019.
Vis sammendrag
1.
We examined the effects of multiple predators from an intertidal boulder food web
to test whether and how three different predator species affected the survival of a small
amphipod species.
2.
Predators were chosen because they differ in their foraging mode, two feeding at the
bottom and in benthic refuges (nemertean and shrimp) and one in the water-column
(juveniles of a fish).
3.
Mortality of amphipods was not affected by nemerteans, but was high in the presence
of shrimp or fish. Highest mortalities were observed in predator-combinations that
contained both shrimp and fish. Amphipods responded to shrimp by escaping into the
water column, while they avoided fish by remaining in the refuge. We conclude that predatorspecific
defence causes conflicts for prey when both shrimp and fish are present.
4.
Comparing observed effects of multiple predators with expected effects revealed risk
enhancement for the shrimp + fish combination. A comparison of different predictive
models revealed that the multiplicative model was most appropriate, although additive
models may work well under certain conditions.
5.
Based on known consumption-ranges of the predators used, we conclude that
nemerteans were saturated with prey while fish were far from their saturation point. A
predator’s functional response curve (prey consumption in relation to prey abundance)
determines its impact on prey populations. This knowledge appears essential in order to
predict whether prey organisms face risk enhancement, risk reduction or additive
effects of multiple predators.
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Van, Son Thijs Christiaan & Thiel, Martin
(2006).
Mating behaviour of male rock shrimp, Rhynchocinetes typus (Decapoda: Caridea): effect of recent mating history and predation risk.
Animal Behaviour.
ISSN 0003-3472.
71(1),
s. 61–70.
doi:
10.1016/j.anbehav.2005.03.018.
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Dolan, Margaret; Bekkby, Trine; Buhl-Mortensen, Pål; Andersen, Guri Sogn; van Son, Thijs Christiaan & Thormar, Jonas
[Vis alle 11 forfattere av denne artikkelen]
(2019).
Phasing in use of the “Nature in Norway” (NiN) system for classification and description of nature in the marine environment – experiences, challenges and international relevance. .
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Helgesen, Kari Marie Olli; van Son, Thijs Christiaan; Qviller, Lars; Kristoffersen, Anja Bråthen; Viljugrein, Hildegunn & Jansen, Peder A
(2018).
Hvordan forvalte rigide lusegrenser ved hjelp av usikre lusetall?
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Dolan, Margaret; Bekkby, Trine; Espeland, Sigurd Heiberg; Rinde, Eli; Moy, Frithjof Emil & Elvenes, Sigrid
[Vis alle 16 forfattere av denne artikkelen]
(2018).
Pilot Project for Mapping Marine Nature Types within the NiN Framework, Coastal Norway.
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Jelmert, Anders; Bodvin, Torjan; Harboe, Torstein; van Son, Thijs Christiaan; Kroglund, Tone & Mathisen, H.L.
(2017).
Kartlegging og overvåking av Stillehavsøsters.
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Helgesen, Kari Marie Olli; van Son, Thijs Christiaan; Kristoffersen, Anja Bråthen & Viljugrein, Hildegunn
(2017).
Better salmon lice management through improved understanding of salmon lice counts.
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Qviller, Lars; van Son, Thijs Christiaan & Lillehaug, Atle
(2017).
Epidemiologiske studier av sammenhenger mellom melanin i filét hos laks og infeksjon med piscint orthoreovirus og andre virusinfeksjoner.
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Bekkby, Trine; Rinde, Eli; Oug, Eivind; Buhl-Mortensen, Pål; Thormar, Jonas & Dolan, Margaret
[Vis alle 13 forfattere av denne artikkelen]
(2021).
Forslag til forvaltningsrelevante marine naturenheter.
Norsk institutt for vannforskning.
ISSN 978-82-577-7408-0.
Fulltekst i vitenarkiv
Vis sammendrag
Regjeringen ønsker å prioritere kartlegging av naturtyper som enten er truet, viktige for mange arter, dekker sentrale
økosystemfunksjoner, eller er spesielt dårlig kartlagt. En marin faggruppe ble nedsatt for å operasjonalisere kriteriene og bruke
disse til å velge ut forvaltningsrelevant marin natur ved bruk av NiN-systemet.
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Jelmert, Anders; Espeland, Sigurd Heiberg; Ohldieck, Martin Junker; van Son, Thijs Christiaan & Naustvoll, Lars Johan
(2020).
Kartlegging av Stillehavsøsters (Crassostrea gigas) - Bestandskartlegging Karmøy - Svenskegrensa 2017 - 2019.
Havforskningsinstituttet.
ISSN 1893-4536.
Fulltekst i vitenarkiv
Vis sammendrag
Med endringer i havmiljøene, vil også dynamikken i marine økosystemer kunne endres og nye arter vil kunne etableres seg i norske farvann slik som stillehavsøsters ( Magallana gigas ). Arten etablerte seg allerede på 1990 tallet i Vadehavet på den danske vestkysten og fra 2006 spredde den seg videre langs skagerrakkysten. Arten er definert som fremmed, invasiv og er plassert i risikokategorien «Høy Økologisk Risiko», på grunn av spredningspotensiale og økologisk effekt (Artsdatabanken). Stillehavsøsters anses om bioinvasiv og er en art som endrer de økosystemene hvor den etablere seg, og som vil kunne ha en direkte negativ effekt på stedegne arter, som for eksempel blåskjell og flatøsters. Arten har også uønskede negative sosioøkonomiske effekter knyttet til forringelse av strender og andre naturområder.
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Se alle arbeider i Cristin
Publisert
18. des. 2020 12:09
- Sist endret
18. des. 2020 12:10