Can urban P conservation help to prevent the brown devolution?

نویسنده

  • Lawrence A Baker
چکیده

Achieving better understanding phosphorus (P) flows through urban ecosystems is needed to conserve P, as non-renewable phosphate rock deposits become depleted and the global human population increases. A baseline mass flow analysis (MFA) for P developed for the Twin Cities Watershed (TCW, which includes most of the Minneapolis-St. Paul metropolitan region) showed that most P input was stored in the system (65%) or leaked from it (31%); only 4% was deliberately exported as useful products. In a realistic, comprehensive conservation scenario P input was reduced by 15%; deliberate export of P in the form of sewage sludge, food waste, and landscape waste was 68% of P input. In this scenario, increased deliberate export was accomplished by decreasing leakage (to 9% of input) and storage (to 23% of input). If used as agricultural fertilizer, the deliberately exported P in the conservation scenario would support about half of the food production required by the TCW.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The Role of Social Capital in The Conservation of Historical Buildings

Today, we see that despite the plans and decisions made about the historical fabric, the people are very faintly seen and conservation the historic fabric of urban is one of the main concerns management urban In the absence of efficient management and lack of attention to the needs of local people, the historical Fabric Urban is destroyed. In this article are examined Ways other than physical m...

متن کامل

The Study of Safavi Northern Chahar-Bagh Street of Shiraz, Iran; from the Standpoint of Integrated Conservation and Development Based on Historical Urban Landscape Approach

The historical urban landscape is a new approach towards the historical city as the product of human interaction with micro ecosystem over the passage of time that has recently gained a special position in urban conservation. This paper begins with raising the question that how this approach can be used to solve the challenges of conservation and development of historical cities. Exploring the ...

متن کامل

Identifying suitable habitats for brown bear (Ursus arctos) in northern Zagros forests

Wildlife is an important biological indicator of viability of ecosystems, therefore, understanding habitat requirements of species is essential for biodiversity conservation. Determining the suitability of habitats for wildlife is important for effective management and conservation of species. The brown bear (Ursus arctos), as the largest carnivorous mammal in Iran, is distributed in most fores...

متن کامل

Urban expansion as a driver of biodiversity loss: Integrating biodiversity in urban planning in African context

Africa has high biodiversity and is rapidly urbanizing. However, there is limited understanding of how urban expansion in Africa is likely to affect its habitats and biodiversity. Little urban ecological research has been done in Africa. This study needs to think ahead as Africa move into the “urban age” it is critical to inform the public on the importance of urban environment...

متن کامل

Developing a Conceptual Framework of Integrity in Urban Heritage Conservation

The concept of integrity, as a factor of sustaining values and significance of cultural heritage, is considered to be a key element in the process of urban heritage conservation. Review and analysis of documents, conventions and theories concerning the role of integrity in urban heritage conservation shows that in recent decades, the concept of integrity has attracted attention worldwide in the...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Chemosphere

دوره 84 6  شماره 

صفحات  -

تاریخ انتشار 2011