Inst. Ökologie

120 Items

Recent Submissions
Mesoscale mapping of sediment source hotspots for dam sediment management in data-sparse semi-arid catchments

Smetanová, Anna ; Müller, Anne ; Zargar, Morteza ; Suleiman, Mohamed A. ; Gholami, Faraz Rabei ; Mousavi, Maryam (2020-02-01)

Land degradation and water availability in semi-arid regions are interdependent challenges for management that are influenced by climatic and anthropogenic changes. Erosion and high sediment loads in rivers cause reservoir siltation and decrease storage capacity, which pose risk on water security for citizens, agriculture, and industry. In regions where resources for management are limited, ide...

Linkages between Phosphorus and Plant Diversity in Central European Forest Ecosystems—Complementarity or Competition?

Rieger, Isaak ; Kowarik, Ingo ; Ziche, Daniel ; Wellbrock, Nicole ; Cierjacks, Arne (2019-12-17)

The phosphorus nutrition status of European forests has decreased significantly in recent decades. For a deeper understanding of complementarity and competition in terms of P acquisition in temperate forests, we have analyzed α-diversity, organic layer and mineral soil P, P nutrition status, and different concepts of P use efficiency (PUE) in Fagus sylvatica L. (European beech) and Picea abies ...

Wild Bee Conservation within Urban Gardens and Nurseries: Effects of Local and Landscape Management

Egerer, Monika ; Cecala, Jacob M. ; Cohen, Hamutahl (2019-12-30)

Across urban environments, vegetated habitats provide refuge for biodiversity. Gardens (designed for food crop production) and nurseries (designed for ornamental plant production) are both urban agricultural habitats characterized by high plant species richness but may vary in their ability to support wild pollinators, particularly bees. In gardens, pollinators are valued for crop production. I...

Uptake, Growth, and Pigment Changes in Lemna minor L. Exposed to Environmental Concentrations of Cylindrospermopsin

Flores-Rojas, Nelida Cecilia ; Esterhuizen-Londt, Maranda ; Pflugmacher, Stephan (2019-11-07)

Cylindrospermopsin (CYN)-producing cyanobacterial blooms such as Raphidiopsis, Aphanizomenon, Anabaena, Umezakia, and Lyngbya spp. are occurring more commonly and frequently worldwide. CYN is an environmentally stable extracellular toxin, which inhibits protein synthesis, and, therefore, can potentially affect a wide variety of aquatic biota. Submerged and floating macrophytes, as primary produ...

Biodiversity Impact of Green Roofs and Constructed Wetlands as Progressive Eco-Technologies in Urban Areas

Knapp, Sonja ; Schmauck, Sebastian ; Zehnsdorf, Andreas (2019-10-21)

The total amount of sealed surfaces is increasing in many urban areas, which presents a challenge for sewerage systems and wastewater treatment plants when extreme rainfall events occur. One promising solution approach is the application of decentralized eco-technologies for water management such as green roofs and constructed wetlands, which also have the potential to improve urban biodiversit...

Penetration Depth of a Soil Moisture Profile Probe Working in Time-Domain Transmission Mode

Kafarski, Marcin ; Majcher, Jacek ; Wilczek, Andrzej ; Szyplowska, Agnieszka ; Lewandowski, Arkadiusz ; Zackiewicz, Alicja ; Skierucha, Wojciech (2019-12-12)

Soil moisture is one of the most important soil parameters. Knowledge of volumetric water content (VWC) of the root zone as well as the VWC dynamics in the soil profile is especially important for agriculture. Monitoring VWC at several depths in the soil profile can be performed using several soil moisture sensors placed at various depths. However, the use of a profile probe is more convenient,...

Phosphorus availability and growth of benthic primary producers in littoral lake sediments

Gillefalk, Mikael ; Herzog, Christiane ; Hilt, Sabine (2019-05-27)

Submerged macrophytes and periphyton are benthic primary producers that play an important role for several ecosystem functions of lakes. Their growth often depends on the availability of phosphorus (P) in sediments and overlying water. This P availability is assumed to potentially be affected by induced bank filtration (IBF), a cost-effective method for drinking water production. In this study,...

Emerging Urban Forests: Opportunities for Promoting the Wild Side of the Urban Green Infrastructure

Kowarik, Ingo ; Hiller, Anne ; Planchuelo, Greg ; Seitz, Birgit ; von der Lippe, Moritz ; Buchholz, Sascha (2019-11-11)

Many cities aim to increase urban forest cover to benefit residents through the provision of ecosystem services and to promote biodiversity. As a complement to traditional forest plantings, we address opportunities associated with “emerging urban forests” (i.e., spontaneously developing forests in cities) for urban biodiversity conservation. We quantified the area of successional forests and an...

Greenhouse gas formation and flux across boundaries in urban water bodies

Herrero Ortega, Sonia (2019)

Methane (CH4) emissions from urban fresh water are starting to be addressed. CH4 as a greenhouse gas (GHG), enhances global warming of the earth. Any anthropogenic source of this greenhouse gas should be understood in order to reduce its atmospheric concentrations. On the other side, urban areas and expanding, and they modify surface waters. Recent literature has superficially approached the ef...

Contrasting changes of urban heat island intensity during hot weather episodes

Fenner, Daniel ; Holtmann, Achim ; Meier, Fred ; Langer, Ines ; Scherer, Dieter (2019-11-27)

Cities typically exhibit higher air temperatures than their rural surroundings, a phenomenon known as the urban heat island (UHI) effect. Contrasting results are reported as to whether UHI intensity (UHII) is exacerbated or reduced during hot weather episodes (HWEs). This contrast is investigated for a four-year period from 2015 to 2018, utilising a set of observational data from high-quality m...

Prominent Midlatitude Circulation Signature in High Asia's Surface Climate During Monsoon

Mölg, Thomas ; Maussion, Fabien ; Collier, Emily ; Chiang, John H. C. ; Scherer, Dieter (2017-11-18)

High Asia has experienced strong environmental changes in recent decades, as evident in records of glaciers, lakes, tree rings, and vegetation. The multiscale understanding of the climatic drivers, however, is still incomplete. In particular, few systematic assessments have evaluated to what degree, if at all, the midlatitude westerly circulation modifies local surface climates in the reach of ...

Forest plantations and native forests: Strategies to achieve multifunctional, biodiverse and sustainable forest landscapes

Pozo Inofuentes, Paola Sarela (2019)

The area covered by monoculture timber plantations of fast-growing exotic species has increased exponentially over the last years and the impact on local ecosystems has been controversially debated, especially in the countries of the global South. With a current need to develop alternative approaches that achieve forest productivity while conserving biodiversity new strategies need to be tackle...

Occurrence and Coupling of Heat and Ozone Events and Their Relation to Mortality Rates in Berlin, Germany, between 2000 and 2014

Krug, Alexander ; Fenner, Daniel ; Holtmann, Achim ; Scherer, Dieter (2019-06-25)

Episodes of hot weather and poor air quality pose significant consequences for public health. In this study, these episodes are addressed by applying the observational data of daily air temperature and ozone concentrations in an event-based risk assessment approach in order to detect individual heat and ozone events, as well as events of their co-occurrence in Berlin, Germany, in the years 2000...

Atmospheric Electricity Influencing Biogeochemical Processes in Soils and Sediments

Hunting, Ellard R. ; Harrison, R. Giles ; Bruder, Andreas ; van Bodegom, Peter M. ; van der Geest, Harm G. ; Kampfraath, Andries A. ; Vorenhout, Michel ; Admiraal, Wim ; Cusell, Casper ; Gessner, Mark O. (2019-04-16)

The Earth’s subsurface represents a complex electrochemical environment that contains many electro-active chemical compounds that are relevant for a wide array of biologically driven ecosystem processes. Concentrations of many of these electro-active compounds within Earth’s subsurface environments fluctuate during the day and over seasons. This has been observed for surface waters, sediments a...

River doctors: Learning from medicine to improve ecosystem management

Elosegi, Arturo ; Gessner, Mark O. ; Young, Roger G. (2017)

Effective ecosystem management requires a robust methodology to analyse, remedy and avoid ecosystem damage. Here we propose that the overall conceptual framework and approaches developed over millennia in medical science and practice to diagnose, cure and prevent disease can provide an excellent template. Key principles to adopt include combining well-established assessment methods with new ana...

Untangling the role of urban ecosystems as habitats for endangered plant species

Planchuelo, Gregorio ; von der Lippe, Moritz ; Kowarik, Ingo (2019-05-21)

As urbanization accelerates globally, a better understanding of how cities contribute to biodiversity conservation is increasingly pressing. Previous studies reveal that cities can harbor a considerable biological richness, including endangered plant species. Yet, a key question on the urban contribution to plant conservation remains critically open, as little information is available on how po...

Urbanisation impacts on rare and endangered plant species

Planchuelo, Gregorio (2019)

Given the rising urban land cover worldwide, the contribution of cities to the conservation of biodiversity becomes increasingly important. Previous research shows that urban environments can host high numbers of species, including endangered plant species. Yet, key questions on the urban contribution to plant conservation remain critically open, as little information is available on how popula...

Contrasting effects of biochar on N2O emission and N uptake at different N fertilizer levels on a temperate sandy loam

Sun, Zhencai ; Sänger, Anja ; Rebensburg, Philip ; Lentzsch, Peter ; Wirth, Stephan ; Kaupenjohann, Martin ; Meyer-Aurich, Andreas (2017)

Biochar has been frequently suggested as an amendment to improve soil quality and mitigate climate change. To investigate the optimal management of nitrogen (N) fertilization, we examined the combined effect of biochar and N fertilizer on plant N uptake and N2O emissions in a cereal rotation system in a randomized two-factorial field experiment on a sandy loam soil in Brandenburg, Germany. The ...

Advanced In Situ Soil Water Sampling System for Monitoring Solute Fluxes in the Vadose Zone

Reck, Arne ; Paton, Eva ; Kluge, Björn (2019-07-25)

To estimate potential risks of groundwater contamination, national and international environmental legislation stipulates standard values referred to pollutant contents in the soil and more rarely referred to loads in the soil leachate. Although in situ soil leachate analysis yields more realistic drainage water quality estimates than soil contamination level–derived estimates, there is no exis...

The Human Influence Experiment (Part 2): Guidelines for Improved Mapping of Local Climate Zones Using a Supervised Classification

Verdonck, Marie-leen ; Demuzere, Matthias ; Bechtel, Benjamin ; Beck, Christoph ; Brousse, Oscar ; Droste, Arjan ; Fenner, Daniel ; Leconte, François ; Van Coillie, Frieke (2019-02-28)

Since 2012, Local Climate Zones (LCZ) have been used for numerous studies related to urban environment. In 2015, this use amplified because a method to map urban areas in LCZs was introduced by the World Urban Database and Access Portal Tools (WUDAPT). However in 2017, the first HUMan INfluence EXperiment showed that these maps often have poor or low quality. Since the maps are used in differen...