Anticipated increases in the frequency, duration or intensity of high temperature events ('heat waves') have the potential to significantly impact forest form and functioning, but these events remain virtually unstudied in forest ecosystems. This thesis presents the results of an event-driven research effort into the impacts of three days of record-setting high temperatures in late May 2010 on key ecophysiological parameters in Sugar Maple (Acer saccharum. Marsh). High temperatures reduced photosynthetic capacity by ~66% versus previous years and total end-of-season leaf litter production by ~33% versus prior measurements. It is predicted that these reductions substantially reduced productivity for Sugar Maple in 2010. These results constitute the first description of the impacts of a short-duration heat wave on productivity-related parameters in a temperate forest tree. The predicted increase in high temperature events could make such impacts a significant, though so far overlooked, pathway of climate change impacts on temperate forests.

Anticipated increases in the frequency, duration or intensity of high temperature events ('heat waves') have the potential to significantly impact forest form and functioning, but these events remain virtually unstudied in forest ecosystems. This thesis presents the results of an event-driven research effort into the impacts of three days of record-setting high temperatures in late May 2010 on key ecophysiological parameters in Sugar Maple (Acer saccharum. Marsh). High temperatures reduced photosynthetic capacity by ~66% versus previous years and total end-of-season leaf litter production by ~33% versus prior measurements. It is predicted that these reductions substantially reduced productivity for Sugar Maple in 2010. These results constitute the first description of the impacts of a short-duration heat wave on productivity-related parameters in a temperate forest tree. The predicted increase in high temperature events could make such impacts a significant, though so far overlooked, pathway of climate change impacts on temperate forests.

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Of the findings, the European Commission established in its report on Energy Sector Inquiry, market manipulation constituted a major concern for the functioning and integrity of EU energy sectors. The Commission argued that the responsibility for high prices in wholesale energy markets could be attributed to manipulative practices of energy incumbents and the trust in the operation of operation of sector was largely compromised, due to these practices. Remedies, EU competition law provided, were considered as insufficient to resolve these shortcomings and thus should be supplemented with regulatory-based tools. The findings of the Energy Sector Inquiry and subsequent consultation documents by multiple EU institutions paved the way for the adoption of the Regulation on wholesale energy market integrity and transparency, REMIT, which incorporated into an anti-manipulation rule, specifically designed to prohibit and prosecute manipulative practices in EU wholesale energy markets. Nevertheless, as EU case law on market manipulation has yet to develop and there are uncertainties with respect to the concept of market manipulation. Furthermore REMIT does not preclude the jurisdiction of EU competition law, questions arise as to the scope and the extent of the application of this prohibition. Throughout its chapters, this book explores the scope of and the case law on market manipulation to determine what types of market practices are regarded as manipulative and thus prohibited under anti-manipulation rules. It also focuses on the interplay between REMIT and EU competition law and evaluates factors and circumstances that determine when and what market misconduct can be subject to enforcement proceedings under both anti-manipulation and antitrust rules. As the development of a single, coherent, rulebook that can be relied upon by market participant is fundamental for the functioning of EU wholesale energy markets, the book, finally, provides proposals and measures that can mitigate and resolve the legal uncertainties regarding the regulatory framework REMIT established.

La coopération entre les autorités de régulation en matière de communications électroniques et d’énergie s’inscrit dans le contexte de mutation de l’administration européenne qui est intervenue au fil des deux dernières décennies. Son architecture institutionnelle est marquée par la forte européanisation des autorités de régulation,laquelle est le résultat de l’harmonisation opérée par le droit de l’Union européenne et de la diffusion de meilleures pratiques. La coopération entre les autorités de régulation se fonde néanmoins sur des principes juridiques flous en droit primaire. Elle est de plus marquée par l’ambigüité de la délégation des pouvoirs à l’échelle de l’Union européenne. Dans les deux secteurs étudiés, elle traduit l’hybridation des modèles de gouvernance que sont les « agences de l’Union européenne » et les « réseaux d’autorités », car elle a donné naissance à une « agence en réseau » puissante dans le domaine de l’énergie - l’ACRE- et à un « réseau agenciarisé » faible en matière de communications électroniques– l’ORECE.Pour assurer l’effectivité de l’ « Union de droit », les actes de ces organismes de l’Unioneuropéenne sont contrôlés par le juge de l’Union européenne, dont la saisine par lesparticuliers reste malheureusement difficile. Dans ce contexte, le Médiateur européen présente un potentiel fort en tant qu’instance de contrôle complémentaire. Quant au prétendu déficit démocratique souligné par les détracteurs de l’Union européenne, il est ici démenti car le Parlement européen assure un contrôle démocratique efficace sur les organismes étudiés. Si ses moyens de contrôle politique sont largement informels et méritent d’être approfondis, le contrôle qu’il exerce dans le cadre de la procédure de décharge budgétaire peut, quant à lui, déboucher sur une transformation de l’architecture institutionnelle des organismes étudiés. / The cooperation among regulatory authorities in the field of electronic communications and energy takes place against the background of the transformation of the european administration in the last two decades. Its institutional design bears the mark of the europeanisation of regulators through the harmonisation brought about by EU law and the diffusion of best practices. The cooperation among regulatory authorities is formalised on the basis of a primary law that is vague. It is also marked by ambiguity with regard to the delegation of pouvoirs on a European level. In the sectors of energy and electronic communications, it reflects the « hybrisation » of two models of governance, European agencies and networks, giving birth to a powerful « network agency » in the field of energy-the ACER- and a weak « agenciarised network » in the field of electronic communications- the BEREC. The control of the acts of these two organisms in a « Union of law » is ensured by the Cour of justice of the European Union which is, however, difficult to accessfor individuals. In this context, the European Ombudsman demonstrates a real potential as a complementary forum of control. Against a priori hypotheses with respect to the democratic deficit of the European Union, the European Parliament effectively ensures the democratic control of ACER and BEREC. Even if its means of political control are largelyinformal and should be better defined, the control it exercices in the context of the budgetary discharge procedure is capable of transforming the institutional design of the above mentioned organisms.

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