Aquatic Ecosystems and Climate Changes: Data Gaps in Relation to Flooding Events

Special Article - Floods

Austin Environ Sci. 2021; 6(1): 1055.

Aquatic Ecosystems and Climate Changes: Data Gaps in Relation to Flooding Events

Marcheggiani S¹*, Puccinelli C¹, Tancioni L², Mancini L¹, Chiudioni F¹, Lacchetti I¹ and Carere M¹

¹Environment and Health Department, Istituto Superiore di Sanità, Italy

²Biology Department, University of Rome Tor Vergata, Italy

*Corresponding author: Marcheggiani S, Environment and Health Department, Italian Institute of Health, Viale Regina Elena 299, 00161, Rome, Italy

Received: February 13, 2021; Accepted: March 09, 2021; Published: March 16, 2021

Abstract

At European level the strategy on adaptation to climate changes promoted adaptation plans at all levels and has recommended the need to bridge the gaps through applications of actions at local level. In the paper has been remarked that there are some gaps in the European legislation that should be solved through the funding of more research projects and pilot studies; for example the use of microbiological monitoring, not foreseen by the water framework directive, can help to identify and prevent effect adverse on human health. In this study we propose an operative methodology to be applied at local level with the aim to support the institutional requirements for risk management before and after flooding events, based on a multi-criteria approach. This integrated monitoring plan could represent a shared methodology with the aim to give a contribution for the management of the risks of extreme weather events such as flooding for human health and ecosystem protection.

Keywords: Aquatic ecosystem; Flooding; Microbiology; Ecotoxicology; Human health; Investigative monitoring

Introduction

During the past centuries, anthropogenic pressure, urbanization and, climate changes got worst the aquatic ecosystem quality [1]. The effects of climate changes on meteorological parameters give rise to extreme events such as floods, heat or cold waves [2]. Flooding is a major disturbance that impacts aquatic ecosystems and the ecosystem services that they provide and all populations living in the area affected suffer theirs impacts [3-5]. They can damage the environment, infrastructures, properties as well as human health and cultural heritages [6,7]. These impacts can be due to direct contact with floodwaters detritus causing damage to infrastructure, health facilities and deaths due to drowning; also physical trauma, heart attacks, electrocution, carbon monoxide poisoning can occur. Instead, the longer-term effects can appear days, weeks or months later and they are less easily identified, and can they include infectious diseases, vector-borne diseases burn and mental health effects [8]. Several are the factors that enhanced the negative effects of flood events: as the presence of artificialized banks, hydro- morphological alteration, the presence of infrastructures, deforesting, use of agricultural practices harmful for the environment; excessive extraction of groundwater and the soil impermeabilisation that prevents infiltration of water. The flooding and flash flood produce immediate runoff from agricultural, zootechnical areas, water treatment facilities and sewage systems with a progressive mobilization of microbiological, physical and chemical contaminants ensues [9-17]. Further, the spread of any contaminants such as micropollutants can be enhanced also by a range of other climate variables, such as wind patterns snowfall [18].

The spread of bioaccumulative chemical substances (e.g. mercury, dioxins, Polycyclic Aromatic Hydrocarbons (PAH)) enhanced by flooding events, is a signal of a current or future impact on aquatic ecosystems, considering the value of goods like seafood. They affect all levels of aquatic trophic chain causing: changing of bacteria composition, alteration in morphology (teratogenic forms) and in community composition of diatoms as well as the appearance of skeletal abnormalities in fish fauna, and an overall reduction of biodiversity [19,20]. In a certain areas it can generate a future decline of fishing activities, added to other impacts, for instance the decrease of the water level of a lake, used for the abstraction of drinking water, can impact the future water uses and the abundance of aquatic organisms [21].

Further, changes on temperature parameter can affect the biological community causing growth of green algae and diatoms, with the occurrence of harmful algal blooms, as well as fish communities can be altered in terms of size-structures, composition and abundances, in fish fauna [22-24].

Over the last 20 years flood events have been recorded in 49 of the 53 Member States of WHO Region and data indicate that approximately 400 floods have caused the deaths of more than 2000 people [25,26]. At global level many actions and activities have been developed for the prevention and risk management to human health. For example in Europe the aquatic ecosystems assessment is based on the obligations that derive from the laws recommend parameters and criteria used to assess the surface water quality through operational and surveillance monitoring based on biological, microbiological and chemical parameters but no indication is provided on emergency monitoring closely linked to flooding events [27-29]. The Floods Directive 2007/60/EC provides a framework for adaptation and establishes a legal framework for the assessment and management of flood risks across Member States, aiming at reducing the adverse consequences of floods to the human health, the environment, cultural heritage and economic activity and the flood risk management can be summarized in the four phases of emergency management: prevention, preparedness, response and recovery [30]. A survey of countries in the WHO Region highlighted the gaps in the prevention of health effects of floods and the availability of timely flood–health response strategies or established action plans [10].

In this study we propose an operative methodology to be applied at local level with the aim to support the institutional requirements for risk management before and after flooding events, based on a multi-criteria approach.

Identification of Data Gaps

The main gaps that need to be improved to right management of the risks for human health linked by flooding are the following:

• Identification of potential risk area.

• Identification of microbiological, biological and chemical hazards.

• Setting criteria and methods for emergency monitoring programme.

• Risk communication.

Operative Plan Proposal

In this study we propose an operative methodology to be applied at local level with the aim to support the institutional requirements for risk management before and after flooding events, based on a multi-criteria approach (Figure 1).

Citation: Marcheggiani S, Puccinelli C, Tancioni L, Mancini L, Chiudioni F, Lacchetti I, et al. Aquatic Ecosystems and Climate Changes: Data Gaps in Relation to Flooding Events. Austin Environ Sci. 2021; 6(1): 1055.