I am interested in experimental and functional ecology. Primarily I am interested in species-driven ecological processes such as herbivory and decomposition and the role functional traits play in driving these processes. Consequently, I am also focusing how functional traits vary with environmental change. I have mainly been focused on lichens and the role they play in the ecosystem especially how they impact higher trophic levels. However, I am currently also studying bryophytes and vascular plants. I am also interested in how tree species affect microbial diversity and how species-driven changes below-ground feed backs the above-ground vegetation.
I am currently leading the project "Functional traits across primary producer groups and their effects on tundra ecosystem processes" funded by the Research Council of Norway.
More information about the project can be found here.
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Publikasjoner
Peer-reviewed papers
2019:
(43) Roos, R. E., Zuijlen, K. van, Birkemoe, T., Klanderud, K., Lang, S. I., Bokhorst, S., Wardle, D.A., Asplund, J. (2019). Contrasting drivers of community-level trait variation for vascular plants, lichens and bryophytes across an elevational gradient. Functional Ecology, doi: 10.1111/1365-2435.13454
(42) Ransedokken, Y., Asplund, J., Ohlson, M., & Nybakken, L. (2019). Vertical distribution of soil carbon in boreal forest under European beech and Norway spruce. European Journal of Forest Research. doi:10.1007/s10342-019-01176-4
(41) Asplund, J., Kauserud, H., Ohlson, M., Nybakken, L. (2019) Spruce and beech as local determinants of forest fungal community structure in litter, humus and mineral soil. FEMS Microbiology Ecology 95:fiy232 doi:10.1093/femsec/fiy232
2018:
(40) Asplund, J., Strandin, O.V., Gauslaa, Y. (2018) Gastropod grazing of epiphytic lichen-dominated communities depends on tree species. Basic and Applied Ecology. 32:96-102 doi:10.1016/j.baae.2018.07.007
(39) Nybakken, L., Lie, M.H., Julkunen-Tiitto, R., Asplund, J., Ohlson M. (2018) Fertilization changes chemical defense in needles of mature Norway spruce (Picea abies). Frontiers in Plant Science. 9:Article 770 doi: 10.3389/fpls.2018.00770
(38) Halsall, K.M., Ellingsen, V.M., Asplund, J., Bradshaw, R.H.V., Ohlson M. (2018) Fossil charcoal quantification using manual and image analysis approaches. Holocene. 28:1345–1353 doi:10.1177/0959683618771488
(37) Asplund, J., Hustoft, E., Nybakken, L., Ohlson M., Lie, M.H. (2018) Litter impair spruce seedling emergence in beech forests: a litter manipulation experiment. Scandinavian Journal of Forest Research. 33:332-337 doi:10.1080/02827581.2017.1388440
(36) Asplund, J., Gauslaa, Y., Merinero S. (2018) Low synthesis of secondary compounds in the lichen Lobaria pulmonaria infected by the lichenicolous fungus Plectocarpon lichenum. New Phytologist 217:1397-1400 doi:10.1111/nph.14978
(35) Asplund, J., Kauserud, H., Bokhorst, S., Lie, M.H., Ohlson, M., Nybakken, L (2018) Fungal communities influence decomposition rates of plant litter from two dominant tree species. Fungal Ecology 38:1-8 doi:10.1016/j.funeco.2017.11.003
2017:
(34) Asplund, J., Wardle, D.A. (2017) How lichens impact on terrestrial community and ecosystem properties. Biological Reviews 92:1720-1738. doi:10.1111/brv.12305
(33) Asplund, J., Siegenthaler, A., Gauslaa, Y. (2017) Simulated global warming increases usnic acid but reduces perlatolic acid in the mat-forming terricolous lichen Cladonia stellaris. Lichenologist 49:269-274. doi:10.1017/S0024282917000159
(32) Ohlson, M., Ellingsen, V.M., del Olmo M. V., Lie, M.H., Nybakken, L., Asplund, J. (2017) Late Holocene fire history as revealed by size, age and composition of the soil charcoal pool in neighbouring beech and spruce forest landscapes in SE Norway. Holocene 27:397-403. doi:10.1177/0959683616660174
(31) Ellingsen, V.M., Asplund, J., Ohlson, M. (2017) Spatial and temporal patterns in seed predation as revealed by reciprocal experiments and video-surveillance in neighbouring beech and spruce forests. Scandinavian Journal of Forest Research 32:105-114. doi:10.1080/02827581.2016.1215523
2016:
(30) Jonsson, M., Snäll, T., Asplund, J., Clemmensen, K.E., Dahlberg, A., Kumordzi, B.B., Lindahl, B.D., Oksanen, J., Wardle, D.A. (2016) Divergent responses of β-diversity among organism groups to a strong environmental gradient. Ecosphere. 7:e01535. doi:10.1002/ecs2.1535
(29) Kasin, I., Ellingsen, V., Asplund, J., Ohlson, M. (2016) Spatial and temporal dynamics of the soil charcoal pool in relation to fire history in a boreal forest landscape. Canadian Journal of Forest Research. 47:28-35 doi:10.1139/cjfr-2016-0233
(28) Kolstad, A.L., Asplund, J., Nilsson, M.-C., Ohlson, M., Nybakken, L., (2016) Soil fertility and charcoal as determinants of growth and allocation of secondary plant metabolites in seedlings of European beech and Norway spruce. Environmental and Experimental Botany 131:39-46. http://dx.doi.org/10.1016/j.envexpbot.2016.06.013
(27) Asplund, J., Gauslaa, Y. & Merinero, S. (2016) The role of fungal parasites in tri-trophic interactions involving lichens and lichen-feeding snails. New Phytologist 211:1352-1357 http://dx.doi.org/10.1111/nph.13975
(26) Gauslaa Y., Yemets O.A., Asplund J., Solhaug K.A. (2016) Carbon based secondary compounds do not provide protection against heavy metal road pollutants in epiphytic macrolichens. Science of the Total Environment 541, 795-801. http://dx.doi.org/10.1016/j.scitotenv.2015.09.114
2015:
(25) Westberg, M., E. Timdal, J. Asplund, M. Bendiksby, R. Haugan, F. Jonsson, P. Larsson, G. Odelvik, M. Wedin, and A. Millanes. (2015) New records of lichenized and lichenicolous fungi in Scandinavia. MycoKeys 11:33–61. http://dx.doi.org/10.3897/mycokeys.11.6670
(24) Asplund, J., Bokhorst, S., Kardol, P., Wardle, D.A. (2015) Removal of secondary compounds increases invertebrate abundance in lichens. Fungal Ecology 18:18-25. http://dx.doi.org/10.1016/j.funeco.2015.07.009.
(23) Asplund, J., Ohlson, M., Gauslaa, Y., 2015. Tree species shape the elemental composition in the lichen Hypogymnia physodes transplanted to pairs of spruce and beech trunks. Fungal Ecology 16: 1-5. http://dx.doi.org/10.1016/j.funeco.2015.03.006
(22) Bokhorst, S., Asplund, J., Kardol, P., Wardle, D.A., 2015. Lichen physiological traits and growth forms as drivers of communities of associated invertebrates. Ecology. 96, 2394-2407. http://dx.doi.org/10.1890/14-1030.1
(21) Asplund, J., Wardle, D.A., 2015. Changes in functional traits of the terricolous lichen Peltigera aphthosa across a retrogressive boreal forest chronosequence. Lichenologist. 47: 187-195. http://dx.doi.org/10.1017/S0024282915000092
2014:
(20) Asplund, J., Wardle, D.A., 2014. Within-species variability is the main driver of community-level responses of traits of epiphytes across a long term chronosequence. Funct. Ecol. 28, 1513–1522. http://dx.doi.org/10.1111/1365-2435.12278
(19) Asplund, J., Sandling, A., Kardol, P., Wardle, D.A., 2014. The influence of tree-scale and ecosystem-scale factors on epiphytic lichen communities across a long-term retrogressive chronosequence. J. Veg. Sci. 25, 1100–1111. http://dx.doi.org/10.1111/jvs.12149
2013:
(18) Asplund, J., Wardle, D.A., 2013. The impact of secondary compounds and functional characteristics on lichen palatability and decomposition. J. Ecol. 101, 689–700. http://dx.doi.org/10.1111/1365-2745.12075
(17) Asplund, J., Bokhorst, S., Wardle, D.A., 2013. Secondary compounds can reduce the soil micro-arthropod effect on lichen decomposition. Soil Biol. Biochem. 66, 10–16. http://dx.doi.org/10.1016/j.soilbio.2013.06.013
(16) Gauslaa, Y., Bidussi, M., Solhaug, K.A., Asplund, J., Larsson, P., 2013. Seasonal and spatial variation in carbon based secondary compounds in green algal and cyanobacterial members of the epiphytic lichen genus Lobaria. Phytochemistry 94, 91–98. http://dx.doi.org/10.1016/j.phytochem.2013.04.003
2012:
(15) Asplund, J., Wardle, D.A., 2012. Contrasting changes in palatability following senescence of the lichenized fungi Lobaria pulmonaria and L. scrobiculata. Fungal Ecol. 5, 710–713. http://dx.doi.org/10.1016/j.funeco.2012.06.004
(14) Asplund, J., Sandling, A., Wardle, D.A., 2012. Lichen specific thallus mass and secondary compounds change across a retrogressive fire-driven chronosequence. PLoS ONE 7, e49081. http://dx.doi.org/10.1371/journal.pone.0049081
2011:
(13) Asplund, J., 2011a. Chemical races of Lobaria pulmonaria differ in palatability to gastropods. Lichenologist 43, 491–494. http://dx.doi.org/10.1017/S0024282911000387
(12) Asplund, J., 2011b. Snails avoid the medulla of Lobaria pulmonaria and L. scrobiculata due to presence of secondary compounds. Fungal Ecol. 4, 356–358. http://dx.doi.org/10.1016/j.funeco.2011.05.002
(11) Vatne, S., Asplund, J., Gauslaa, Y., 2011. Contents of carbon based defence compounds in the old forest lichen Lobaria pulmonaria vary along environmental gradients. Fungal Ecol. 4, 350–355. http://dx.doi.org/10.1016/j.funeco.2011.03.007
2010:
(10) Asplund, J., Gauslaa, Y., 2010. The gastropod Arion fuscus prefers cyanobacterial to green algal parts of the tripartite lichen Nephroma arcticum due to low chemical defence. Lichenologist 42, 113–117. http://dx.doi.org/10.1017/S0024282909990284
(9) Asplund, J., Johansson, O., Nybakken, L., Palmqvist, K., Gauslaa, Y., 2010a. Simulated nitrogen deposition influences lichen palatability for gastropods. Ecoscience 17, 83–89. http://dx.doi.org/10.2980/17-1-3331
(8) Asplund, J., Larsson, P., Vatne, S., Gauslaa, Y., 2010b. Gastropod grazing shapes the vertical distribution of epiphytic lichens in forest canopies. J. Ecol. 98, 218–225. http://dx.doi.org/10.1111/j.1365-2745.2009.01584.x
(7) Asplund, J., Solhaug, K.A., Gauslaa, Y., 2010c. Optimal defense - snails avoid reproductive parts of the lichen Lobaria scrobiculata due to internal defense allocation. Ecology 91, 3100–3105. http://dx.doi.org/10.1890/09-1829
(6) Gauslaa, Y., Larsson, P., Asplund, J., 2010. Selective feeding by gastropods in Lobaria scrobiculata allows quantification of intrathalline anatomical layers. Lichenologist 42, 621–625. http://dx.doi.org/10.1017/S0024282910000137
(5) Vatne, S., Solhøy, T., Asplund, J., Gauslaa, Y., 2010. Grazing damage in the old forest lichen Lobaria pulmonaria increases with gastropod abundance in deciduous forests. Lichenologist 42, 615–619. http://dx.doi.org/10.1017/S0024282910000356
2009:
(4) Asplund, J., Solhaug, K.A., Gauslaa, Y., 2009. Fungal depsidones - an inducible or constitutive defence against herbivores in the lichen Lobaria pulmonaria? Basic Appl. Ecol. 10, 273–278. http://dx.doi.org/10.1016/j.baae.2008.04.003
2008:
(3) Asplund, J., Gauslaa, Y., 2008. Mollusc grazing limits growth and early development of the old forest lichen Lobaria pulmonaria in broadleaved deciduous forests. Oecologia 155, 93–99. http://dx.doi.org/10.1007/s00442-007-0891-z
2007:
(2) Asplund, J., Gauslaa, Y., 2007. Content of secondary compounds depends on thallus size in the foliose lichen Lobaria pulmonaria. Lichenologist 39, 273–278. http://dx.doi.org/10.1017/S0024282907006718
(1) Nybakken, L., Asplund, J., Solhaug, K.A., Gauslaa, Y., 2007. Forest successional stage affects the cortical secondary chemistry of three old forest lichens. J. Chem. Ecol. 33, 1607–1618. http://dx.doi.org/10.1007/s10886-007-9339-5
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Forskning & prosjekt
Prosjekter
We ask: how will climate change and other stress factors interact to transform spruce ecosystems to beech ecosystems in the future?
Forskningsområder