Publication in limnology: Aquatic effects of peat extraction and peatland forest drainage: a comparative sediment study of two adjacent lakes in Central Finland

-
https://media-springernature-com.sire.ub.edu/w306/springer-static/cover/journal/12665/75/23.jpg
KAUPPILA, T., AHOKAS, T., NIKOLAJEV-WIKSTRÖM, L., MÄKINEN, J., TAMMELIN, M.H. & MERILÄINEN, J.J. 2016. 

Aquatic effects of peat extraction and peatland forest drainage: a comparative sediment study of two adjacent lakes in Central Finland. Environmental Earth Sciences 75: 1473. DOI: 10.1007/s12665-016-6278-x

The aquatic effects of forestry practices and peat extraction continue to cause serious concerns. The effect mechanisms of peat extraction on water quality and aquatic ecology of the receiving surface waters are well known, but the impacts are often difficult to differentiate from those of forest management. A pairwise temporal sediment study was conducted on two adjacent lakes in Central Finland to study whether the unique effects of peat extraction can be detected in an area of intensive forest drainage. Both lakes are affected by forestry, but the reference lake has no history of peat extraction in its watershed. The deepest parts of the lakes were cored through the lacustrine sediments, and the recent carbon and dry matter sedimentation rates were compared to their site-specific reference values. Recent changes in benthic macroinvertebrates (chironomids) and diatom algae were studied to assess the ecological effects of these practices in the lakes. No significant differences in recent increases in carbon accumulation were found between the peat extraction-impacted lake and the reference lake. The pairwise comparison allowed identification of a regional pattern of impacts that is closely related to the history of land use, particularly forestry, in the region. The approach also allowed identification of the transient signs of peat extraction in the chemical and chironomid records of the impacted lake. The recent changes in chironomids and diatoms suggest eutrophication and deterioration in benthic conditions likely caused by drainage ditch network maintenance activities in the catchments.

(Link: https://link.springer.com/article/10.1007/s12665-016-6278-x)

Comments

Post a Comment

Thank you for your comment. Due to an increased number of spam comments, we have felt the need to moderate this section. Your comment will appear in up to 72h. Thank you for your understanding.

Kind regards

Young ISDR

Popular posts from this blog

The role of geology behind diatom communities

-
Image
Geological setting in Finland The last glaciation, approximately 10 000 years ago, eroded and deposited material leaving behind a landscape full of glacial landforms in northern Europe. These landforms include thick layers of basal tills, glaciofluvial eskers, and moraines, to name a few. The retreating glacier also left behind a multitude of lakes in Finland. These lakes are often shallow and elongated in the direction of the ice flow. A majority of the lakes are located in central-eastern Finland, called the Finnish Lake District, where a relatively coarse-grained basal till covers most of the land surface. These tills deposited under actively flowing ice lobes that flushed away the finer materials. However, in the intersection of two actively flowing ice lobes, a passive interlobate area formed. This wedge-shaped area pierces central Finland in a NW-SE direction and is characterized by fine-grained basal till. The coastal areas of Finland, on the other hand, were under water ...
Read more

Diatom(s) of the Month - November 2017: the recently-digitized Diatom New Taxon File (DNTF) at the Academy of Natural Sciences

-
Image
by Alison Minerovic* What is the “DNTF”? The Diatom New Taxon File, or “DNTF”, is a digitized card catalog of all published diatom names, along with original descriptions, images, and literature citations of taxa published since 1933. It serves as a resource for diatom scientists, taxonomists, systematists, students, and enthusiasts! Figure 1 . DNTF Homepage (from 25 September 2017). The original card catalog lives in the Diatom Herbarium at the Academy of Natural Sciences in Philadelphia (ANSP), Pennsylvania, USA. Although we no longer add physical cards to the DNTF, Herbarium staff manage and update digital “cards” through our website: http://symbiont.ansp.org/dntf/  (Fig. 1) . Why is the DNTF important? As many of you know, diatom taxonomy – names, descriptions, and classification – is continually changing. Projects like the DNTF are important for maintaining consistent taxonomy, which forms the foundation of all applied diatom research. For example, s...
Read more