Saplings of four clones of Sitka spruce and cherry were grown for three and two growing seasons, respectively, in open top chambers at two CO2 concentrations (\uffe2\uff89\uff88\uffe2\uff80\uff83350 and \uffe2\uff89\uff88\uffe2\uff80\uff83700\uffe2\uff80\uff83\uffce\uffbcmol\uffe2\uff80\uff83mol\uffe2\uff80\uff931) to determine whether the increase in total biomass brought about by enhanced [CO2] is a result of a transient or persistent effect in nonlimiting conditions. Classical growth analysis was applied to both species and mean current relative growth rate of total dry mass (RT) and leaf dry mass (RL), and period relative growth rate of total dry mass ( ) and leaf dry mass ( ) were calculated. Sitka spruce saplings and cherry seedlings showed a positive growth response to elevated [CO2], and at the end of the experiments both species were \uffe2\uff89\uff88\uffe2\uff80\uff8340% larger in elevated [CO2] than in ambient [CO2]. As a result, the period mean and were significantly higher in elevated [CO2]. The differences in plant dry mass at the end of the experiments were a consequence of the more rapid growth in the early phase of exposure to elevated [CO2]. After this initial phase mean RT and RL were similar or even lower in elevated [CO2] than in ambient [CO2]. NAR of both species was much higher in elevated [CO2], whereas both LAR, SLA, and LMR showed the opposite trend. The higher LAR and SLA of plants in ambient [CO2] contributed to a compensation by which they maintained RT similar to that of elevated [CO2] saplings despite lower NAR and photosynthetic rate. However, when the same size the trees were similar amongst the [CO2] treatments, indicating that one of the main effect of elevated [CO2] on tree growth is to speed\uffe2\uff80\uff90up early development in all aspects.
", "keywords": ["0106 biological sciences", "Relative growth rate", "Tree growth", "Ontogeny", "Cherry", "Sitka spruce", "Dry mass allocation", "Growth analysis", "15. Life on land", "01 natural sciences", "[object Object"], "contacts": [{"organization": "Centritto M, Lee HSJ, Jarvis PG,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1046/j.1365-2486.1999.00263.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1046/j.1365-2486.1999.00263.x", "name": "item", "description": "10.1046/j.1365-2486.1999.00263.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1046/j.1365-2486.1999.00263.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1999-08-01T00:00:00Z"}}, {"id": "10.1046/j.1365-3040.2002.00831.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-27T16:18:35Z", "type": "Journal Article", "created": "2003-03-12", "title": "N-2 Fixation By Acacia Species Increases Under Elevated Atmospheric Co2", "description": "AbstractIn the present study the effect of elevated CO2 on growth and nitrogen fixation of seven Australian Acacia species was investigated. Two species from semi\uffe2\uff80\uff90arid environments in central Australia (Acacia aneura and A. tetragonophylla) and five species from temperate south\uffe2\uff80\uff90eastern Australia (Acacia irrorata, A. mearnsii, A. dealbata, A. implexa and A. melanoxylon) were grown for up to 148\uffe2\uff80\uff83d in controlled greenhouse conditions at either ambient (350\uffe2\uff80\uff83\uffc2\uffb5mol\uffe2\uff80\uff83mol\uffe2\uff88\uff921) or elevated (700\uffe2\uff80\uff83\uffc2\uffb5mol\uffe2\uff80\uff83mol\uffe2\uff88\uff921) CO2 concentrations. After establishment of nodules, the plants were completely dependent on symbiotic nitrogen fixation. Six out of seven species had greater relative growth rates and lower whole plant nitrogen concentrations under elevated versus normal CO2. Enhanced growth resulted in an increase in the amount of nitrogen fixed symbiotically for five of the species. In general, this was the consequence of lower whole\uffe2\uff80\uff90plant nitrogen concentrations, which equate to a larger plant and greater nodule mass for a given amount of nitrogen. Since the average amount of nitrogen fixed per unit nodule mass was unaltered by atmospheric CO2, more nitrogen could be fixed for a given amount of plant nitrogen. For three of the species, elevated CO2 increased the rate of nitrogen fixation per unit nodule mass and time, but this was completely offset by a reduction in nodule mass per unit plant mass.
", "keywords": ["0106 biological sciences", "0301 basic medicine", "2. Zero hunger", "Acacia mearnsii", "Elevated atmospheric CO2", "Aneura Acacia", "Acacia", "growth response", "15. Life on land", "01 natural sciences", "Acacia dealbata", "Relative growth rate", "03 medical and health sciences", "nitrogen fixation", "Acacia aneura", "Nitrogenase", "Keywords: carbon dioxide enrichment", "Acacia melanoxylon"]}, "links": [{"href": "https://doi.org/10.1046/j.1365-3040.2002.00831.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%2C%20Cell%20%26amp%3B%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1046/j.1365-3040.2002.00831.x", "name": "item", "description": "10.1046/j.1365-3040.2002.00831.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1046/j.1365-3040.2002.00831.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2002-03-21T00:00:00Z"}}, {"id": "10.1890/02-3005", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-27T16:20:42Z", "type": "Journal Article", "created": "2007-06-04", "title": "Co-2 Enrichment Reduces The Energetic Cost Of Biomass Construction In An Invasive Desert Grass", "description": "To examine how global change could influence species invasions, we compared the responses of energetic processes and growth of invasive and native grass species to atmospheric CO2 enrichment in an intact Mojave Desert ecosystem. Combined with its modest influence on photosynthetic activity, elevated atmospheric CO2 was associated with a significant reduction in the energetic cost of aboveground biomass construction in invasive Bromus madritensis spp. rubens (red brome) without a concurrent cost reduction in native Vulpia octoflora (six-weeks fescue). Consequently, the invasive grass species grew faster, grew bigger, and produced more seeds with atmospheric CO2 enrichment than the native grass species. As a physiological mechanism of invasive species success driven by CO2 enrichment, such alterations in biomass construction costs combined with increased photosynthetic activity could trigger a shift in the species composition of this ecosystem, and potentially that of other invaded ecosystems, toward increa...", "keywords": ["0106 biological sciences", "2. Zero hunger", "Bromus madritensis spp. rubens", "Invasive species", "Invasive grasses", "Red brome", "Systems Biology", "Plant Biology", "Native grasses", "NDFF", "Weed Science", "15. Life on land", "01 natural sciences", "Mojave Desert", "Vulpia octoflora", "Relative growth rate", "13. Climate action", "Energetics", "Six-weeks fescue", "Construction cost", "Elevated CO2", "Photosynthesis", "Nevada"]}, "links": [{"href": "https://doi.org/10.1890/02-3005"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1890/02-3005", "name": "item", "description": "10.1890/02-3005", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1890/02-3005"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2004-01-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Relative+growth+rate&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Relative+growth+rate&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Relative+growth+rate&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Relative+growth+rate&offset=3", "hreflang": "en-US"}], "numberMatched": 3, "numberReturned": 3, "distributedFeatures": [], "timeStamp": "2026-07-27T18:04:37.152396Z"}