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Jonathan Havenhand


Jonathan Havenhand
Akademisk grad: Doktor,
031-786 9682

Postadress: Tjärnö, 45296 Strömstad
Besöksadress: Tjärnö , 45296 Strömstad

Institutionen för marina vetenskaper (Mer information)
Box 461
405 30 Göteborg
Besöksadress: Carl Skottsbergs gata 22 B , 413 19 Göteborg

Om Jonathan Havenhand

Jon Havenhand researches the evolutionary ecology of reproduction in marine invertebrates, focussing on intra-specific variation in fertilization and larval viability and the role of ocean acidification.


Description of research activities

Jon Havenhand’s research focuses on the evolution of early life-history characteristics in marine invertebrates. This ranges from investigations of gamete-compatibilties in broadcast-spawning species, to the selective benefits of different larval forms.


Fertilization and Larval Ecology of marine invertebrates
The majority of marine animals release their gametes freely into the water-column, where they fertilize, and develop. This process is neither simple nor risk-free: gametes can face many difficulties locating each other and fertilizing successfully. Gamete dilution can be a big problem, but sometimes eggs may also be exposed to too many sperm - leading to death of the embryo. Once gametes have encountered each other successfully, a variety of compatibility mechanisms may determine which individual’s sperm is most likely to bind, penetrate, and fertilize the egg. Not surprisingly, a variety of adaptations have evolved in response to these selective pressures, and much recent theory has focussed on this.

Fertilized embryos also face a number of challenges - not least because they’re usually unprotected and easy prey for many planktivorous predators. In some species embryos may develop rapdily without feeding into larvae that settle and metamorphose within hours of fertilization. In others, embryos develop as longer-term larvae that feed and grow in the plankton for many weeks before settling to the seabed and metamorphosing into a juvenile.

The great variety of larval forms in marine invertebrates was comprehensively classified only 60 years ago by Gunnar Thorson. Since that time the ecology and evolution of reproduction in marine invertebrates has been a focus of research, not least because the different energetic costs, survival probabilities, dispersal capacities and behaviours of these different larval forms have deep significance for population dynamics, gene-flow, and adaptation in marine species. Jon currently works with several closely related aspects of this area:

  • patterns, causes and consequences of variation in sperm:egg compatibility
  • effects of ocean acidification on early life-history stages of marine invertebrates - including the assessment of non-significant results
  • impacts of larval type on the energetics of adult populations

Jon is pursuing these research interests in collaboration with a number of Masters and PhD students as well as several leading international researchers.

Senaste publikationer

Ocean acidification as a multiple driver: how interactions between changing seawater carbonate parameters affect marine life
Catriona L. Hurd, John Beardall, Steeve Comeau, Christopher E. Cornwall, Jonathan N. Havenhand et al.
Marine and Freshwater Research, Artikel i vetenskaplig tidskrift 2020
Artikel i vetenskaplig tidskrift

Sperm motility of oysters from distinct populations differs in response to ocean acidification and freshening
L. J. Falkenberg, C. A. Styan, Jonathan N. Havenhand
Scientific Reports, Artikel i vetenskaplig tidskrift 2019
Artikel i vetenskaplig tidskrift

Ecological & functional consequences of coastal ocean acidification: perspectives from the Baltic-Skagerrak system
Jonathan N. Havenhand, Helena L. Filipsson, Susa Niiranen, Max Troell, Anne-Sophie Crépin et al.
Ambio, Forskningsöversiktsartikel 2019

Societal causes of, and responses to, ocean acidification.
Sverker C. Jagers, Simon Matti, Anne-Sophie Crépin, David Langlet, Jonathan N. Havenhand et al.
Ambio, Artikel i vetenskaplig tidskrift 2019
Artikel i vetenskaplig tidskrift

Handbook to support the SCOR Best Practice Guide for ‘Multiple Drivers’ Marine Research
Philip Boyd, S. Collins, Samuel Dupont, K. Fabricius, J.-P. Gattuso et al.
University of Tasmania, Rapport 2019

Toxic Algae Silence Physiological Responses to Multiple Climate Drivers in a Tropical Marine Food Chain
Lucy M. Turner, Jonathan N. Havenhand, C. Alsterberg, A. D. Turner, S. K. Girisha et al.
Frontiers in Physiology, Artikel i vetenskaplig tidskrift 2019
Artikel i vetenskaplig tidskrift

Influence of bacteria on shell dissolution in dead gastropod larvae and adult Limacina helicina pteropods under ocean acidification conditions
A. R. Bausch, M. A. Gallego, J. Harianto, P. Thibodeau, N. Bednarsek et al.
Marine Biology, Artikel i vetenskaplig tidskrift 2018
Artikel i vetenskaplig tidskrift

Visar 21 - 30 av 79


Variable Individual- and Population- Level Responses to Ocean Acidification
Mikko Vihtakari, Jonathan N. Havenhand, Paul Renaud, Iris Hendriks
"Frontiers in Marine Science", Artikel i vetenskaplig tidskrift 2016
Artikel i vetenskaplig tidskrift

Ocean acidification has lethal and sub-lethal effects on larval development of yellowfin tuna, Thunnus albacares
A. Y. Frommel, D. Margulies, J. B. Wexler, M. S. Stein, V. P. Scholey et al.
Journal of Experimental Marine Biology and Ecology, Artikel i vetenskaplig tidskrift 2016
Artikel i vetenskaplig tidskrift

Sperm Accumulated Against Surface: A novel alternative bioassay for environmental monitoring
L. J. Falkenberg, Jonathan N. Havenhand, C. A. Styan
Marine Environmental Research, Artikel i vetenskaplig tidskrift 2016
Artikel i vetenskaplig tidskrift


No barrier to emergence of bathyal king crabs on the Antarctic shelf
Richard Aronson, KE Smith, SC Vos, JB McClintock, MO Amsler et al.
Proceedings of the National Academy of Science of the United States of America, Artikel i vetenskaplig tidskrift 2015
Artikel i vetenskaplig tidskrift

The potential impact of ocean acidification on eggs and larvae of the Yellowfin Tuna.
D. Bromhead, V. Scholey, S. Nicol, D. Margulies, J. Wexler et al.
Deep-sea research. Part II, Topical studies in oceanography, Artikel i vetenskaplig tidskrift 2015
Artikel i vetenskaplig tidskrift

Ocean acidification impacts on sperm mitochondrial membrane potential bring sperm swimming behaviour near its tipping point
P. Schlegel, M. T. Binet, Jonathan N. Havenhand, C. J. Doyle, J. E. Williamson
Journal of Experimental Biology, Artikel i vetenskaplig tidskrift 2015
Artikel i vetenskaplig tidskrift

Visar 21 - 30 av 79

Sidansvarig: Annika Wall|Sidan uppdaterades: 2019-04-09

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