Day 2 :
Kaohsiung Medical University, Taiwan
Time : 09:30-10:15
Hans-Uwe Dahms was born in Germany where he received his PhD and DSc degrees in Biology. He was invited to more than 80 countries worldwide for research and lecturing. He is currently a Professor at the Department of Biomedical Science and Environmental Biology in Kaohsiung Medical University, Taiwan. His current research is concerned with environmental health issues affecting public health.
Xenobiotics are affecting the oceans. Among them are antibiotics (ABs) used worldwide to treat diseases and protect the health of humans, animals and plans alike. They are also incorporated into animal feed to improve growth rate and feed efficiency. As antibiotics are poorly absorbed in the gut, the majority is excreted unchanged in feces and urine. Given that land applications of sewage and its subsequent leaching to aquifers is often a common practice in many countries, there is a growing international concern about the potential impact of antibiotic residues on the environment. Frequent use of antibiotics has also raised concerns about increased antibiotic resistance of microorganisms. We here give the opportunity to update information available in the literature on the use, sales, exposure pathways, environmental occurrence, fate, effects and remediation of ABs in the aquatic environment. Only recently, more complex investigations of ABs were made to assess the environmental risks they may pose. Within the last decade an increasing number of studies covering antibiotic input, occurrence, fate and effects were published, but there is still a lack of understanding about antibiotics in the aquatic environment with respect to input sources and quantities, pathways, fate and effects on non-target organisms.
Xiamen University, China
Time : 10:15-11:00
Luo Ping Zhang has his expertise in marine environmental monitoring and integrated environmental quality assessment, strategic environmental assessment and environmental risk assessment, coastal and regional environmental planning and management.
So far, the most popular methods for ecosystem valuation are ecosystem service valuation (ESV), which is based on the utility of ecosystem to human beings rather than on the objective value of the ecosystem. After more than 10 years’ application, it has been found that all losses of ESV were about 10% of the benefits of human activities. The ecosystem intrinsic value (EIV) is defined as an objective value of ecosystem in the earlier studies that emerges from the existence, substance, energy, information, structures, functions and processes of ecosystem, but independent with man, man’s will and preferences. The valuating approach and methods for EIV were developed by using the methods of emergy analysis and eco-exergy analysis from the ecosystem properties, which represents the existent value and the externally working capacity (creative value) of ecosystem, respectively. The evaluating approach and methods of EIV were applied into Xiamen Bay and Pearl River Estuary, China. The results showed that the EIVs of both ecosystems were around USD 54 million km-2 that were irrespective with their socio-economical levels. It demonstrates that the EIVs are the objective value of the ecosystem and independent of human consciousness, will and preference. The total marine EIV in Xiamen Bay was nearly 30 times of ESV and 8.5 times of the GDP of Xiamen marine industry in 2010. EIV in unit area is more than 10 times of the average global ESV in estuaries, the highest marine ESV. It implies a potential undervaluation to ecosystem value by ESV concept and approach. Due to its under-valuating ecosystem, as a result, ESV may mislead decision-making process and results in that ecological degradation continues to accelerate. All of these show that EIV is an objective value of ecosystem, a more rational value can just conserve ecosystem by using it and support decision-making towards sustainability.