New Publications from LOICZ affiliated projects or LOICZ SSC member

From LOICZ SSC member Julius Ibukun AGBOOLA, Ph.D

Elsevier's Journal- Continental Shelf Research (Volume 88, 1 October 2014, Pages 140–150)

Different contributions of riverine and oceanic nutrient fluxes supporting primary production in Ishikari Bay

This study discussed the Ishikari River as a main source of nutrients fueling primary production in the Ishikari Bay. A ratio of riverine nutrient flux (RNF) to bottom nutrient flux (BNF) was computed to determine the relative importance of oceanic and riverine nutrient fluxes on primary production dynamics in Ishikari Bay, which is composed of oligotrophic subarctic coastal water. It successfully underscored the relative importance of riverine nutrient discharge against estuarine circulation in fueling autotrophic biomass and production in the Ishikari Bay. Also, from the results obtained flux ratios of river nutrient (RNF) and bottom nutrient (BNF) (i.e. RNF: BNF) across the examined seasons were significantly >1.0 for DIN and Si(OH)4 nutrients, especially in spring and autumn. Nutrient flux ratio only suggests the signifi- cant contribution of PO4 nutrient from bottom upwelling, espe- cially in summer and autumn. Thus, unlike other estuaries, the relative importance of estuarine circulation in fueling autotrophic production is relatively minimal in the Ishikari Bay.

Although riverine nutrient fluxes were a major source of DIN and Si(OH)4 nutrient supply in the bay, oceanic nutrient contribution from bottom upwelling and horizontal advection was a major source of PO4. While riverine nutrients significantly fuel primary production, the estuarine circulation process may contribute significantly to compensating for the inadequate supply of riverine PO4 in an oligotrophic system like Ishikari Bay. Also, unlike the usual estuarine system in which nutrient concentration at a deeper layer is high due to the regeneration of nutrients at depth, concentration in Ishikari Bay was very low due to an influence of oligotrophic waters. It concludes that riverine nutrient flux contributes a large portion of the total flux in Ishikari Bay.

DOI: 10.1016/j.csr.2014.07.013

link to publication in Elsevier's Journal- Continental Shelf Research


From LOICZ Affiliated project:

Remote Sensing of Environment (Volume 150, July 2014, Pages 218–230)

Variability of suspended particulate matter concentration in coastal waters under the Mekong's influence from ocean color (MERIS) remote sensing over the last decade

 

Hubert Loisel, Antoine Mangin, Vincent Vantrepotte, David Dessailly, Dat Ngoc Dinh, Philippe Garnesson, Sylvain Ouillon, Jean-Pierre Lefebvre, Xavier Mériaux, Thu Minh Phan (2014): Variability of suspended particulate matter concentration in coastal waters under the Mekong's influence from ocean color (MERIS) remote sensing over the last decade. Remote Sensing of Environment 150 (2014) 218-230.

DOI: 10.1016/j.rse.2014.05.006

New ELSEVIER publication via Science Direct available!


From LOICZ SSC member Claudia Künzer:

Applied Geography (Volume 53, September 2014, Pages 354–368)

Land surface dynamics and environmental challenges of the Niger Delta, Africa: Remote sensing-based analyses spanning three decades (1986–2013)

Claudia Kuenzer, Sybrand van Beijma, Ursula Gessner, Stefan Dech 

DOI: 10.1016/j.apgeog.2014.07.002

New ELSEVIER publication via Science Direct available!


International Waters Science article on 'Improving science and policy in managing land-based sources of pollution' out now.

Ramesh Ramachandran (a), Purvaja Ramachandran (a), Kem Lowry (b), Hartwig Kremer (c), Marcus Lange (c)

Highlights

• Research on system changes and global sustainability should be policy relevant.
• IW science and research on LBSP should link natural and social scientists and policy-makers.
• Common frameworks help frame key environmental issues and adaptive management efforts.
• IW science addresses rationales for global research initiatives such as Future Earth.

Abstract

Detailed scientific information about degraded systems and impacts of land-based sources of pollution [LBSP] including information about accelerating costs caused by degradation are readily available. Conveying and bringing this information to decision-makers and the public requires both efficient transmission of findings and institutional support for decision-making.

In 2010 the Global Environment Facility [GEF] developed a medium-sized project on ‘Enhancing the use of science in International Waters projects to improve projects results׳ to examine the role of science and technical analysis in transboundary water projects. This article follows up an analysis of the LBSP working group. The emphasis was on examining the science-policy interface in over forty projects dealing with LBSP. The analytical framework combined descriptive [scientific component-incorporation into project design and implementation], evaluative [extent of use of analytical tools] and prescriptive elements. Best practices for management of LBSP were identified. The prescriptive analysis discussed the importance of enhancing communication among scientists and policy makers. The authors conclude that a common framework [here the DPSIR, further developed as DPSWR approach] should be applied across projects to enable collective framing of the key environmental issues and working towards informal adaptive management.

read more on ScienceDirect


doi

doi

New ELSEVIER publication: Different contributions of riverine and oceanic nutrient fluxes supporting primary production in Ishikari Bay (Volume 88, 1 October 2014, Pages 140–150)

Future Earth Blog

Future Earth

Future Earth Website

Future Earth

LOICZ Imagefilm online!