The role of Aşiyan Cemetery (İstanbul) as a green urban space from an ecological perspective and its importance in urban plant diversity

İstanbul is one of the fast growing and historical cities in the world, and has many old cemeteries which have belonged to various empires. This study includes the first floristic and plant use results from one of these historical cemeteries (the Aşiyan Cemetery). Vascular plants were collected from the cemetery in order to elaborate plant diversity. A total of 280 plant species was identified from an area of 29.1 decares. 139 of them are spontaneously wild growing taxa in the cemetery and the rest are cultivated on the graves. While the ratio of the area of the cemetery to the area of İstanbul is 0.1%, the cemetery includes 5.5% of the native plants of İstanbul. The steep sloped and stony parts of the cemetery have a native macchia vegetation consisting of Quercus coccifera L., Laurus nobilis L., Pistacia terebinthus L., Phillyrea latifolia L., Jasminum fruticans L., Rhamnus alaternus L., Ephedra foeminea Forssk., Osyris alba L. One of the most important results is the determination of the natural distribution of Rhamnus alaternus, Clematis flammula L. and Ephedra foeminea. This area is a refuge for these three species and the first native record area for R.alaternus in İstanbul. As a conclusion, in spite of covering a small area, the Aşiyan Cemetery has a rich native and horticultural flora, and it is a refuge for three rare species, therefore the cemetery has an important role in urban plant diversity conservation.     

A model of the science–practice–policy interface in participatory land-use planning: lessons from Laos

An essential task of participatory action-research is to help close the policy implementation gap that leads to large discrepancies between policy frameworks and local practices. Too often, official regulations, laws and decrees fail to translate into concrete action on the ground. Loose institutional linkages between research, extension and local communities are often blamed as the main culprits for this gap. In turn, many stakeholders call for enhanced participation as a way to bring together scientists, development practitioners and local communities in negotiating competing claims for natural resources and designing realistic pathways towards sustainable development. Despite such general consensus about the value of participation, the latter cannot be decreed nor imposed. Participation is an emerging quality of collective-action and social-learning processes. In this paper, the experience of participatory land-use planning conducted in Laos serves to illustrate a model of the science–practice–policy interface that was developed to facilitate the interactions between three groups of stakeholders, i.e. scientists, planners and villagers, in designing future landscapes. Emphasis was put on developing an approach that is generic and adaptive enough to be applied nationally while engaging local communities in context-sensitive negotiations. The set of tools and methods developed through action-research contributed to enhanced communication and participation from initial consultation and cooperation stages towards collective decision-making and action. Both the activity of landscape design and the resulting patterns can be improved by incorporating landscape science in strategic multi-stakeholder negotiations.     

Using a landscape ecological perspective to analyze regime shifts in social–ecological systems: a case study on grassland degradation of the Tibetan Plateau

Landscape Ecology - Landscape ecology thinking and social–ecological system (SES) thinking investigate human–environment relationships from the perspective of ‘space’ and...     

How China’s linked urban–rural construction land policy impacts rural landscape patterns: a simulation study in Tianjin,China

Context

To prevent the area of arable land from crossing the limit of 120 million ha arable land red line, China’s government proposed a linked urban–rural construction land policy. This policy helps to protect the arable land but will impact the rural landscape.

Objective

The objective is to evaluate the effect of the linked urban–rural construction land policy on rural landscape in the future.

Methods

We performed a simulation method to predict the rural landscape pattern changes in Tianjin during 2005–2020 using a cellular automata and multi-agent system model under the scenarios with or without implementing this policy. The landscape metrics were calculated for both scenarios to find the effects caused by this policy.

Results

Following this policy, the Total Area and Large Patch Index of arable land decreased slowly. 65.50% of the occupied arable land can be compensated. For rural settlements, the Mean Patch Area increased to 2.87 times that in 2005. Number of Patches reduced greatly, and 1053 of the total rural settlements distributed along the periphery of Tianjin were reclaimed for arable land during 2005–2020. Aggregation Index increased greatly.

Conclusions

According to the simulation model, the policy is effective on slowing down the loss of total arable land and the process of large arable land fragmentation. The increasing degree of aggregation of rural settlements is beneficial to the optimal allocation of resources and rural centralized management. However, as the rural settlements gather to urban construction land, they are more vulnerable to urban issues.