Inst. Ökologie

130 Items

Recent Submissions
One-dimensional heat and mass transfer model for Vertical Greenery Systems - VGheat1D

Hoffmann, Karin (2020-09-02)

Densely populated city quarters lacking green infrastructure increase the urban heat island effect and thermal discomfort outdoors and indoors. Façade greenings (FG) cool buildings and their surroundings through shading, insulation and transpiration, as demonstrated both experimentally and in simulations. FG also reduces the energy consumption for building cooling. Because of complex interrelat...

How Cool Are Allotment Gardens? A Case Study of Nocturnal Air Temperature Differences in Berlin, Germany

Rost, Annemarie Tabea ; Liste, Victoria ; Seidel, Corinna ; Matscheroth, Lea ; Otto, Marco ; Meier, Fred ; Fenner, Daniel (2020-05-13)

Urban green infrastructures have been extensively studied for their ability to mitigate the urban heat island (UHI) effect. However, allotment gardens (AGs)—a prominent type of urban green infrastructure within many European cities—have not yet been comprehensively investigated concerning their microclimates. In this study, nocturnal air temperatures (TN) in 13 AG complexes (AGCs) were measured...

Plant damage in urban agroecosystems varies with local and landscape factors

Egerer, Monika ; Liere, Heidi ; Lucatero, Azucena ; Philpott, Stacy M. (2020-03-18)

Biotic and abiotic factors at local to landscape scales influence insect pest and disease dynamics in agricultural systems. However, relative to studies focused on the importance of these drivers of crop plant damage in rural agricultural systems, few studies investigate plant damage from herbivore insects and plant diseases in urban agroecosystems, and consequently, most urban farmers lack kno...

Heatwaves and urban thermal climates in Berlin, Germany

Fenner, Daniel (2020)

Due to global climate change, frequency, duration, and intensity of heatwaves (HWs) have increased globally, and are projected to further increase. At the same time, ongoing urbanisation puts more and more people at risk of being adversely affected by HWs, as cities alter atmospheric conditions. Most prominent among these alterations is the phenomenon of the ‘urban heat island’ (UHI), describin...

Dog Walkers’ Views of Urban Biodiversity across Five European Cities

Fischer, Leonie K. ; Kowarik, Ingo (2020-04-25)

Contact with nature makes people feel better, live healthier and act more environmentally-friendly. We hypothesized that dog walking, an omnipresent people–nature interaction in cities, translates to a more positive view of urban nature and, subsequently, to more support for conservation initiatives. Insights into such positive side-effects of dog walking are relevant for dog-related urban poli...

CityScapeLab Berlin: A Research Platform for Untangling Urbanization Effects on Biodiversity

Lippe, Moritz von der ; Buchholz, Sascha ; Hiller, Anne ; Seitz, Birgit ; Kowarik, Ingo (2020-03-24)

Urban biodiversity conservation requires an understanding of how urbanization modulates biodiversity patterns and the associated ecosystem services. While important advances have been made in the conceptual development of urban biodiversity research over the last decades, challenges remain in understanding the interactions between different groups of taxa and the spatiotemporal complexity of ur...

Temperature and Humidity Measurements in Allotment Gardens in Berlin 2018 and supplementary Temperature Data of urban and rural Meaurement Stations of TU Berlin

Rost, Annemarie Tabea ; Liste, Victoria ; Seidel, Corinna ; Matscheroth, Lea (2020-04-21)

In this study, nocturnal air temperatures (T_N) of 39 sample sites in 15 allotment garden complexes (AGCs) were obtained in a measurement campaign during summer 2018 in Berlin, Germany.

Clean and Green Urban Water Bodies Benefit Nocturnal Flying Insects and Their Predators, Insectivorous Bats

Straka, Tanja M. ; Lentini, Pia E. ; Lumsden, Linda F. ; Buchholz, Sascha ; Wintle, Brendan A. ; van der Ree, Rodney (2020-03-26)

Nocturnal arthropods form the prey base for many predators and are an integral part of complex food webs. However, there is limited understanding of the mechanisms influencing invertebrates at urban water bodies and the potential flow-on effects to their predators. This study aims to: (i) understand the importance of standing water bodies for nocturnal flying insect orders, including the landsc...

Urbanization Effects on Biodiversity Revealed by a Two-Scale Analysis of Species Functional Uniqueness vs. Redundancy

Kondratyeva, Anna ; Knapp, Sonja ; Durka, Walter ; Kühn, Ingolf ; Vallet, Jeanne ; Machon, Nathalie ; Martin, Gabrielle ; Motard, Eric ; Grandcolas, Philippe ; Pavoine, Sandrine (2020-03-24)

Urbanization is one of the most intensive and rapid human-driven factors that threat biodiversity. Finding an indicator of species community responses to urbanization is crucial for predicting the consequences of anthropogenic land cover changes. Here, we develop a framework that relies on functional originality. A species is original or equivalently distinct, regarding its traits, if it posses...

Endangered Plants in Novel Urban Ecosystems Are Filtered by Strategy Type and Dispersal Syndrome, Not by Spatial Dependence on Natural Remnants

Planchuelo, Greg ; Kowarik, Ingo ; von der Lippe, Moritz (2020-02-14)

Understanding the contribution of cities to nature conservation is gaining increasing importance with a globally accelerating urbanization and requires insights into the mechanisms that underlie urban distribution patterns. While a considerable number of endangered plant species have been reported for cities, the spatial dependence of populations of these species on natural remnants versus anth...

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...