Show simple item record

dc.contributor.advisorChairperson, Graduate Committee: Jack Brookshireen
dc.contributor.authorScott-Klingborg, Aaron Jamesen
dc.contributor.otherJack Brookshire was an author of the article, 'Large trees dominate nitrogen retention across forest succession' submitted to the journal 'Ecology letters' which is contained within this thesis.en
dc.contributor.otherJack Brookshire was an author of the article, 'Expression of sink-driven and transactional nitrogen limitation following stand-replacing disturbance in an inland pacific northwest coniferous forest' submitted to the journal 'Ecosystems' which is contained within this thesis.en
dc.date.accessioned2018-02-27T16:05:29Z
dc.date.available2018-02-27T16:05:29Z
dc.date.issued2016en
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/14328
dc.description.abstractWe seek to understand how the ability of trees to acquire and retain nitrogen (N) changes throughout their lifetimes. This capacity enables trees to act as carbon (C) sinks individually and collectively in forest ecosystems over successional time scales. We evaluate how properties that govern nutrient retention change with tree size and forest age, and how allometric relationships scale up to influence ecosystem-level patterns of N cycling and retention. Most generally, we hypothesized that changes in N uptake and recycling efficiency with increasing tree size would vary with forest age and N availability. Additionally, we evaluated changes in ecosystem-level C and N accumulation throughout secondary forest succession following clear-cut logging disturbances in an effort to understand how N limitation may become expressed over time and interact with forest successional dynamics. Our findings highlight the importance of large trees in ecosystem N cycling and growth. We find that increasing mass growth rates are matched by an increasing capacity to acquire and retain N without necessitating increases in growth efficiency. Research findings indicate that mortality of single trees may hold profound consequences for stand-level N retention in addition to C storage. At the ecosystem scale, we find N accumulation and limitation are dynamic processes that fluctuate in strength and source over forest succession, and that ecosystem accumulation of N was driven predominately by increasing N in plant biomass rather than in soil pools.en
dc.language.isoenen
dc.publisherMontana State University - Bozeman, College of Agricultureen
dc.subject.lcshNitrogen cycle.en
dc.subject.lcshBiogeochemistry.en
dc.subject.lcshPlant succession.en
dc.subject.lcshLife cycles (Biology).en
dc.titleScaling nitrogen retention from trees to forests through successionen
dc.typeThesisen
dc.rights.holderCopyright 2016 by Aaron James Scott-Klingborgen
thesis.degree.committeemembersMembers, Graduate Committee: Jack Brookshire (chairperson); Catherine A. Zabinski; R. Travis Belote.en
thesis.degree.departmentLand Resources & Environmental Sciences.en
thesis.degree.genreThesisen
thesis.degree.nameMSen
thesis.format.extentfirstpage1en
thesis.format.extentlastpage98en
mus.data.thumbpage44en


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record